$134.99
ONE GOAL: KEEP YOUR FEET WARM
Castelli set out to create our warmest bootie ever, which meant rethinking how booties are made. For the windproofing they went with GORE-TEX INFINIUM™ WINDSTOPPER® fleece-backed fabric, which also lets more moisture escape than any other windproof fabric. Then they added a second fleece layer with Polartec® Power Stretch® Pro™, which is unrivaled in overall loft. The two layers are thick enough that they had to do a wheel well single-layer construction by the ball of the foot to prevent the fabric from rubbing on the crank. They made the bootie high for extra warmth and gave reasonable splash protection.