📍 5805 Cutting Blvd, El Cerrito, CA, 94530
📞 510-235-1123
📍 1774 Solano Ave, Berkeley, CA, 94707
📞 510-525-3832
📍 5113 Panama Ave, Richmond, CA, 94804
📞 510-356-4075
📍 2887 College Ave #1, Berkeley, CA, 94705
📞 888-996-6747
The purpose of the Optimal Performance Index System (OPIS™) is to provide objective data, through laboratory shoe testing, and subjective data, through clinical observations, to the athletic footwear industry and medical community, with the goal of reducing injuries and improving athletic performance.
Updated Jul 2026
📍 12557 San Pablo Ave, Richmond, CA, 94805
📞 510-235-0383
🌐 redwingshoes.com
📍 2120 Vine St, Berkeley, CA, 94709
📞 510-849-3628
🌐 walkshop.com
📍 1370 10th St, Berkeley, CA, 94710
📞 510-559-1692