Freedom of movement, comfort of warmth, and protection from wind define the Bike Wear Men's Windstopper Arm Warmer  Windstopper membrane blocks wind and moisture while still allowing air to escape from inside. A fleece lining keeps you warm, and flatlock seams and an anatomical cut provide optimal fit and comfort. Front and side reflective logos act as warning beacons to passing motorists so you can ride the frigid night in safety.