700+ shoes reviewed and cut in half

24 currently testing

32 bought and to be tested

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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

A close-up of Justin Biebers New Balance sneakers - Cut in half
1. We cut shoes in half to be able to see what's inside and do accurate tests.
A close-up of Justin Biebers New Balance sneakers - 20 parameters
2. zapatillas de running New Balance ritmo bajo media maratón talla 30.5.
A close-up of Justin Biebers New Balance sneakers - Comparing the results
3. New Balance 327 NB Collective Pink WWS327PK1.
A close-up of Justin Biebers New Balance sneakers - Wear test
4. We also wear test shoes in their appropriate settings.
A close-up of Justin Biebers New Balance sneakers - No bias
5. No bias: we buy all the shoes on our own and accept no sponsorships.