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

Men's KEEN Vista Energy Shift Carbon-Fiber Shoes - Cut in half
1. We cut shoes in half to be able to see what's inside and do accurate tests.
Men's KEEN Vista Energy Shift Carbon-Fiber Shoes - 20 parameters
2. In our lab, we measure and assess over 20 parameters for each shoe.
Men's KEEN Vista Energy Shift Carbon-Fiber Shoes - Comparing the results
3. Ariat Geneva Pull On Boots.
Men's KEEN Vista Energy Shift Carbon-Fiber Shoes - Wear test
4. innovative sneaker product.
Men's KEEN Vista Energy Shift Carbon-Fiber Shoes - No bias
5. No bias: we buy all the shoes on our own and accept no sponsorships.