ONE GOAL: KEEP YOUR FEET WARM
With the CASTELLI Estremo Cycling Shoe Covers, CASTELLI set out to create its warmest bootie ever, which meant rethinking how booties are made. For the wind proofing, CASTELLI opted for GORE-TEX INFINIUM™ WINDSTOPPER® fleece-backed fabric, which also lets more moisture escape than any other windproof fabric. Then CASTELLI 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 CASTELLI Estremo Cycling Shoe Covers high for extra warmth and gave reasonable splash protection.