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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 Putty.

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Testing process

How we test - Cut in half
1. We cut shoes in half to be able to see what's inside and do accurate tests.
How we test - 20 parameters
2. Strut thigh boot.
How we test - Comparing the results
3. La Sportiva Zapatillas Trail Running Jackal Black Tiger.
How we test - Wear test
4. Sneakers NEW BALANCE U574TY2 Schwarz Violett.
How we test - No bias
5. Sneakers Zero 50481807 10228535 01 White 100.