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We go down the rabbit hole when it comes to running shoe technologies, features, and lab tests. See all our in-depth guides.

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Testing process

YEEZY Knit RNR "Sulfur" boots - Cut in half
1. We cut shoes in half to be able to see what's inside and do accurate tests.
YEEZY Knit RNR "Sulfur" boots - 20 parameters
2. In our lab, we measure and assess over 20 parameters for each shoe.
YEEZY Knit RNR "Sulfur" boots - Comparing the results
3. Our tests are standardized, and our results are comparable.
YEEZY Knit RNR "Sulfur" boots - Wear test
4. We so wear test shoes in their appropriate settings.
YEEZY Knit RNR "Sulfur" boots - No bias
5. James Harden sneakers.