Design Philosophy The idea of using neoprene as a barrier against the cold has been around since 1950\'s in wetsuits, but was only recently adopted for cycling. The theory was; if it can keep you warm in near zero water submersion, it can keep your feet warm on the bike. The FS260-Pro Nemo Overshoe proves this theory correct, helping keep your feet warm on even some of the coolest, dampest days. Superstretch Insulation Superstretch neoprene is used to ensure a snug fit over your shoes and a stretchy abrasion resistant sole and hard wearing aramid stitching makes this an overshoe that you can be ridden time and time again.