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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

New Balance 990v4 Grey M990GL4 For Sale - Cut in half
1. We cut shoes in half to be able to see what's inside and do accurate tests.
New Balance 990v4 Grey M990GL4 For Sale - 20 parameters
2. New Balance 515 V3 WL515PC3.
New Balance 990v4 Grey M990GL4 For Sale - Comparing the results
3. Stone Island x New Balance Football Jersey T-Shirt.
New Balance 990v4 Grey M990GL4 For Sale - Wear test
4. We also wear test shoes in their appropriate settings.
New Balance 990v4 Grey M990GL4 For Sale - No bias
5. No bias: we buy all the shoes on our own and accept no sponsorships.