900+ sail reviewed and cut in half

13 currently testing

14 bought and to be tested

We review sail

Guides

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

How we test - Cut in half
1. We cut sail in half to be able to see what's inside and do accurate tests.
How we test - 20 parameters
2. In our lab, we measure and assess over 20 parameters for each shoe.
How we test - Comparing the results
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How we test - No bias
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