These are the "toe shoes", the "veebraaams", the "goofy little shoes" and the hottest thing in the outdoor industry. Five Fingers are easily dismissed as a fad, until you actually put them on and put them to use. Trust me, I resisted for a long time and when the time came to "quit hatin' and begin investigatin' " the truth was revealed, these little "shoes" are super fun. Whether ChiRunning in colder temperatures or crossing a stream with your kayak, the FiveFingers Flow provides comfortable barefoot protection. A 1.2mm Neoprene lining and 2mm EVA insole provide the thermal insulation and protection. And our new IdroGrip performance rubber (available only in black) is razor-siped for added slip resistance over a variety of surfaces. FLOW IS BEST FOR: Light Trekking,Cold Weather Running, Water Sports Materials: UPPER - 1.2 mm Neoprene & Hypalon® straps CAMO SOLE- Vibram TC-1 performance rubber BLACK SOLE- IdroGrip performance rubber FOOTBED- Antimicrobial microfiber with 2mm EVA insole *Machine washable. Air dry.