Our verdict

La Sportiva totally changes our backpacking game with its uber-light a boot for summer boot. We are impressed with the magic formula of this boot which packs the protection, grip, and support of a standard hiking boot in under 15 oz! You can now expect your long expeditions to take a very speedy turn. Not to mention the Raptor's many other benefits.

Pros

  • Unbelievably lightweight
  • Excellent waterproofing
  • Doesn't let debris and falling rain/snow inside
  • Exceptionally robust and durable
  • Our top pick in
  • Not so stiff and firm in low temperature
  • The boots primary source of stability is a very stiff TPU transfer shank embedded into the midsole
  • Highly supportive collar
  • Ample flexibility

Cons

  • Tight fit
  • Narrow platform

Audience verdict

87
Great!

Who should buy

The a boot for summer is one of La Sportiva's best-selling boots. We believe that it is a fantastic option for hikers in search of:

  • Salomon Quest 4 GTX
  • a boot that's grippy enough to go off-trail and deal with technical terrain
  • effective Gore-Tex waterproofing and protection from debris

its better to consider non-waterproof options review

Who should NOT buy

If you need a highly supportive boot for shuttling heavy loads multiple days in a row, we recommend investing in the Hoka Kaha 2 GTX or the Hoka Anacapa Mid GTX. Toebox width at the big toe.

If you mostly cover moderate terrain, the Salomon X Ultra 4 Mid GTX is a more comfortable and well-rounded design. As a bonus, it's just as lightweight and not as narrow.

its better to consider non-waterproof options lab test

Breathability

Even though Gore-Tex is promoted as a breathable membrane, it is not the kind of breathability you want for 50+°F (10+°C) temperatures.

The video of our smoke-pumping test below gives a pretty clear picture of how airtight the Ultra Raptor II Mid is. There is not even a hint of smoke coming through the material! THus, we can confidently rate its breathability with the lowest possible rating: 1 out of 5.

So, if you need a boot for summer, it's better to consider non-waterproof options.

Test results
a boot for summer 1
Average 1.6
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
1
Breathability
5

Waterproofing

We are happy to report that not a single drop penetrated this La Sportiva boot during our hike test in wet conditions.

its better to consider non-waterproof options gore tex

The boot's GTX membrane extends pretty high up the collar which allowed us to step into some pretty deep puddles and creeks (up to 5 inches/127 mm). Be warned, however, that anything deeper will cause the water to overflow and get inside the boot. And once that happens, you're stuck with damp feet till the end of the hike.

What made the a boot for summer really stand out from other boots is the elastic gaiter-like design at the top of the collar. We found it to be irreplaceable for preventing rain, snow, and debris from creeping inside the boot.

A very welcome add-on and we think should become a must-have in waterproof boots!

Durability

Toebox durability

With robust protective overlays all over it, it's hard to find a better-fortified boot than the its better to consider non-waterproof options.

its better to consider non-waterproof options toe bumper

On the toebox, in particular, there is a large and aggressive toe bumper. We turned to our Dremel to test its abrasion resistance for real.

Twelve seconds of drilling and a minor scuff proved that this is indeed one of the sturdiest toeboxes we've seen on a boot.

On a 1-5 scale, this La Sportiva boot earned the maximum 5 for toebox durability.

its better to consider non-waterproof options Toebox durability test

Test results
a boot for summer 5
Average 4.4
Compared to 20 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
1
Toebox durability
5

Heel padding durability

We also couldn't skip testing the boot's interior lining, especially since it employs Gore-Tex. That's because even a minor tear of this membrane results in losing its waterproofing capacity for good.

Turning to our Dremel once again, we drilled the heel collar lining/padding of the boot for 4 seconds. And the result was quite a relief! The damage was notably smaller compared to other boots, leading us to rate the durability of this part of the shoe as 4 out of 5.

its better to consider non-waterproof options Heel padding durability test
Test results
a boot for summer 4
Average 3.9
Compared to 20 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
1
Heel padding durability
5

Outsole hardness

But the real beast of this hiking boot is the outsole. Looking like it's made of dragon teeth, this combative platform appears very reassuring. But let's test that out.

Knowing about the correlation between rubber hardness and durability, we started by measuring it with a durometer. The tool showed an impressive 91.5 HC which indicates harder-than-average rubber on the Ultra Rubber.

its better to consider non-waterproof options Outsole hardness
Test results
a boot for summer 91.5 HC
Average 87.6 HC
lightweight hiking boots.
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
81.0 HC
Outsole hardness
92.1 HC

Outsole durability

Step two was to turn up the speed on our Dremel to 10K RPM and bore the rubber for 22 seconds.

Sweet mother of all boots! The tool barely went in at all! Can you even see the dent in the photo below?

its better to consider non-waterproof options Outsole durability

Using a tread gauge to measure the depth of it, we got a minuscule 0.4 mm! This is insanely little compared to the typical 1 mm of damage boots get from the same test.

Test results
a boot for summer 0.4 mm
Average 0.7 mm
Compared to 17 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
0.0 mm
Outsole wear
2.0 mm

Outsole thickness

This Raptor boot doesn't cut corners on the thickness of rubber either. Measuring it with a caliper, we got 3.1 mm without lugs. This is a standard outsole width across hiking boots.

its better to consider non-waterproof options Outsole thickness
Test results
a boot for summer 3.1 mm
Average 3.1 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
1.8 mm
Outsole thickness
5.6 mm

Protection

We are truly astonished by the level of durability that the a boot for summer delivers for its lightweight build.

In addition to the parts mentioned above, the boot also features wide microfiber mudguards and thick TPU reinforcements on the sides.

Protriduting sticks, stones, and roots are all a joke to this tough La Sportiva boot. We experienced no pokes or scratches when testing it off the beaten trail.

Weight

When we first got our hands on the a boot for summer, we couldn't wrap our heads around how light it felt! Especially given how burly it looks.

Putting the boot on our scale, we got a mind-blowing 14.6 oz (415g)! It is one of the lightest hiking boots we've ever seen in our lab, especially among those intended for serious hiking.

its better to consider non-waterproof options Weight

Would you believe that these two hiking boots are only 0.3 oz (10 g) away from each other? And that La Sportiva is the lighter one?! 

its better to consider non-waterproof options side view

its better to consider non-waterproof options (14.7 oz/415g)

its better to consider non-waterproof options vs. Ultra Raptor II Mid GTX

Ultra Raptor II Mid GTX (15.0 oz/425g)

Test results
a boot for summer 14.64 oz (415g)
Average 18.45 oz (523g)
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
11.71 oz (332g)
Weight
28.29 oz (802g)

Cushioning

Heel stack

We are not exactly sure how this La Sportiva boot manages to weigh so little. Because it is definitely not lighter at the cost of cushioning.

Measuring the boot's heel stack with a caliper, we got a pretty standard thickness of 34.4 mm. But compared to other backpacking boots, it is thinner than the popular Hoka Kaha (39.3 mm) and the Salomon Quest (38.0 mm).

For regular day hiking, however, we felt like there was plenty of impact protection, even on the rockest stretches of the route.

Test results
a boot for summer 34.4 mm
Average 36.1 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
26.2 mm
Heel stack
46.9 mm

Forefoot stack

Checking the boot's forefoot stack, our caliper showed 20.3 mm which is slightly lower than average.

But in this case, we found it to be a benefit because it helped to give the boot it's flexible and nimble personality.

Test results
a boot for summer 20.3 mm
Average 22.4 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
17.0 mm
Forefoot stack
30.7 mm

Drop

This leaves us with a pretty drastic heel-to-toe drop of 14.1 mm! Wow, we definitely felt our heels elevated in this boot.

its better to consider non-waterproof options Drop

To be honest, we expected it to be lower given that the boot is intended as light and speedy. But this is just a matter of preference. Beginners and hikers with heavier packs will find the higher drop more suitable as it takes the strain off the ankles and prevents fatigue.

Hoka Anacapa Mid GTX Drop

But if you want to go with a more standard hiking boot drop, the Hoka Anacapa Mid GTX is a perfect alternative (10.6 mm).

Test results
a boot for summer 14.1 mm
Average 13.6 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
2.6 mm
Drop
20.9 mm

Midsole softness

Note: a low durometer measurement equals a soft material, whereas a high measurement means it's firm.

Another nice surprise was the boot's balanced cushioning. From the look of it, we expected a very firm underfoot experience but it turned out to be rather comfortable.

Based on our durometer measurements, the boot's foam comes in at 24.3 HA. This is a middle-ground cushioning softness that's neither plush nor harsh. Hiking for hours in this La Sportiva boot did not result in fatigue.

its better to consider non-waterproof options Midsole softness
Test results
a boot for summer 24.3 HA
Average 27.0 HA
lightweight hiking boots.
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
15.4 HA
Midsole softness (soft to firm)
53.3 HA

Difference in midsole softness in cold

To call a boot winter-ready, we test a little more than just waterproofing and grip. We also check how much firmer the cushioning gets in low temperatures.

Having kept the a boot for summer in our freezer for 20 minutes, we repeated the durometer measurements. The foam did firm up to 31.0 HA but it did not get harder than other hiking boots did.

Heel padding durability%.

its better to consider non-waterproof options Difference in midsole softness in cold
Test results
a boot for summer 27.8%
Average 19.7%
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
0%
Difference in midsole softness in cold
100%

Insole thickness

Completing the boot's underfoot cushioning is a well-padded Ortholite insole. It is sufficiently thick at 5.5 mm in the heel.

We really liked its contoured shape that accommodated our aches very ergonomically.

its better to consider non-waterproof options Insole thickness
Test results
a boot for summer 5.5 mm
Average 6.1 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
3.7 mm
Insole thickness
10.7 mm

Stability

Lateral stability test

The its better to consider non-waterproof options doesn't cease to amaze us with how much it hides beneath the lightweight construction.

As you can see from our quick stability test below, it seems like our ankle is held inside a cast! That's how much lateral support you get from the boot. We are glad to report having zero ankle rolling, even on bumpy terrain.

However, the boot's platform turned out to be significantly narrower than average which is a point of concern for wide footers and beginner hikers.

Torsional rigidity

The boot's primary source of stability is a very stiff TPU transfer shank embedded into the midsole.

It gives the Raptor Ultra its incredible torsional rigidity which we rated with a maximum score of 5 in our manual test. Twisting the boot with bare hands is nearly impossible. Much like twisting your ankle, even when you are carrying a heavy load.

Test results
a boot for summer 5
Average 4.3
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
1
Torsional rigidity
5

Heel counter stiffness

We also couldn't help but notice an actual death grip around our ankles inside this La Sportiva boot.

On a 1-5 scale, where 5 is the stiffest, we assessed the boot's heel rigidity as 4. This is all thanks to the stiff stabilizer component at the base of the heel as well as the semi-rigid foam panels on the sides.

its better to consider non-waterproof options stabilizer

Test results
a boot for summer 4
Average 3.4
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
1
Heel counter stiffness
5

Midsole width in the forefoot

What can potentially make the boot a bit shaky is its narrower-than-average platform. Looks like we finally found where La Sportiva compromised to drop the Raptor's weight down.

Measuring the widest part of the midsole in the forefoot, we got only 106 mm. This is quite worrying as most backpacking boots extend as much as 115-117 mm in this area.

its better to consider non-waterproof options Midsole width in the forefoot
Test results
a boot for summer 106.0 mm
Average 111.7 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
96.3 mm
Midsole width in the forefoot
124.6 mm

Midsole width in the heel

The a boot for summer also proved to be among the narrowest hiking boots in the heel.

We got a caliper reading of 80.8 mm in the widest part of the midsole here. Significantly narrower than average!

For that reason, we cannot recommend this hiking boot to beginners, especially if this is going to be their first backpacking boot! A better starting point would be the Hoka Anacapa Mid GTX (112.5/93.1 mm) or the Hoka Trail Code GTX (112.5/91.7 mm).

its better to consider non-waterproof options Midsole width in the heel
Test results
a boot for summer 80.8 mm
Average 87.9 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
71.7 mm
Midsole width in the heel
106.1 mm

Flexibility

Stiffness

The Ultra Raptor is exceptionally stiff torsionally but it's got plenty of forward flex to bend along with the foot.

To measure the boot's flexibility in our lab, we bend it to a 90-degree angle with a force gauge. The latter showed how much force it takes to do that - 32.4N. That is 24% less than it takes a hiking boot on average!

Hard to believe when you first see this tank of a boot.

Test results
a boot for summer 32.4N
Average 43.8N
We use an average of four tests. The video shows one of those tests.
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
16.6N
Stiffness
84.7N

Difference in stiffness in cold

Checking the boot's flexibility again after 20 minutes in the freezer we are happy to report that it hasn't gotten much stiffer!

Heel padding durability.

Nov 30, 2023!

its better to consider non-waterproof options Difference in stiffness in cold
Test results
a boot for summer 24%
Average 26%
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
0%
Difference in stiffness in cold
100%

Grip / Traction

Lug depth

With a fairly average lug depth (4.3 mm based on our caliper), the its better to consider non-waterproof options feels times more grippy than most boots.

its better to consider non-waterproof options Lug depth

Actually, we thought that this boot comes as close to approach shoes as a hiking boot can possibly get! And this is no surprise given the brand's strong game in that footwear category.

its better to consider non-waterproof options outsole

We believe that the boot's secret lies in the size and shape of its lugs as well as their pattern. There is a mix of thin toothy treads as well as large broad ones that both come in to play when they are most needed.

In our hike test, the Ultra Raptor II made us feel very surefooted even on rocky and slippery terrains.

Test results
a boot for summer 4.3 mm
Average 4.2 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
3.0 mm
Lug depth
5.8 mm

Size and fit

Toebox width at the widest part

Having medium-width feet, the Ultra Raptor II Mid felt slightly on the edge of tight for us. So, if you have wide feet or are prone to swelling, it is better to go with the wide option straight away.

Looking at the caliper measurements, we found the boot's toebox to be average - its widest part comes in at 99.8 mm. But the robust toe bumper, overlays, and mudguards all contribute to a notably more constringing fit.

This becomes especially apparent after a few hours of hiking in this La Sportiva boot.

its better to consider non-waterproof options Toebox width at the widest part
Test results
a boot for summer 99.8 mm
Average 101.7 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
95.5 mm
Toebox width at the widest part
110.2 mm

Toebox width at the big toe

Despite the fact that the toebox tip shows 79.7 mm (slightly wider than average), it failed to add more in-boot space for the toes.

We found that the Hoka Anacapa Mid GTX turned out to be much more accommodating in this injure: 116.5 mm and 85.7 mm respectively.

its better to consider non-waterproof options Toebox width at the big toe
Test results
a boot for summer 79.7 mm
Average 78.3 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
67.6 mm
Toebox width at the big toe
91.1 mm

Tongue: gusset type

The boot's tongue is fully gusseted, meaning that it is fully attached to the upper on both sides. This is essential for a waterproof boot to prevent the water, rain, and snow from seeping inside.

its better to consider non-waterproof options fit

On the other hand, it also plays an important role in creating a secure wrap around the foot and ankle, locking them securely in place.

Compared to other hiking boots we've tested, the Ultra Raptor has a notably snugger, one-to-one fit. Which can be good or bad depending on your preference.

its better to consider non-waterproof options Tongue: gusset type
Test results
a boot for summer Both sides (full)

Comfort

Tongue padding

Keeping the interiors nice and cozy, the boot's tongue is very generously padded. Measuring its thickness with a caliper, we got a standard 10.2 mm for a hiking boot.

its better to consider non-waterproof options Tongue padding
Test results
a boot for summer 10.2 mm
Average 11.1 mm
Compared to 24 hiking boots
Checking the boots forefoot stack, our caliper showed 20.3 mm which is slightly lower than average
5.9 mm
Tongue padding
22.3 mm

Removable insole

The insole is easy to remove in the its better to consider non-waterproof options.

its better to consider non-waterproof options Removable insole
Test results
a boot for summer Yes

Misc

Reflective elements

The reflective details are pretty minor on this La Sportiva boot and are limited to small stripes on the fabric eyelets. Still better than nothing for low-light conditions.

Test results
a boot for summer Yes