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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

Capa intermedia en gris con cremallera corta Running Tenacity de New Balance - Cut in half
1. We cut shoes RED in half to be able to see what's inside and do accurate tests.
Capa intermedia en gris con cremallera corta Running Tenacity de New Balance - 20 parameters
2. In our lab, we measure and assess over 20 parameters for each shoe.
Capa intermedia en gris con cremallera corta Running Tenacity de New Balance - Comparing the results
3. Our tests are standardized, and our results are comparable.
Capa intermedia en gris con cremallera corta Running Tenacity de New Balance - Wear test
4. blue leather lace up boots.
Capa intermedia en gris con cremallera corta Running Tenacity de New Balance - No bias
5. No bias: we buy all the shoes RED on our own and accept no sponsorships.