900+ shoes reviewed and cut in half

13 currently testing

14 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

Exploded shoe to the left shows how the guide rail and torsion system is integrated into the sole - Cut in half
1. We cut shoes in half to be able to see what's inside and do accurate tests.
Exploded shoe to the left shows how the guide rail and torsion system is integrated into the sole - 20 parameters
2. In our lab, we measure and assess over 20 parameters for each shoe.
Exploded shoe to the left shows how the guide rail and torsion system is integrated into the sole - Comparing the results
3. Tiny Cordones Blue Pop Plaid Shoes 12 Blupo Toddle.
Exploded shoe to the left shows how the guide rail and torsion system is integrated into the sole - Wear test
4. Proenza Schouler sculpted 90mm tall boots.
Exploded shoe to the left shows how the guide rail and torsion system is integrated into the sole - No bias
5. Meteora Chelsea Boots Noir 10.