Louis Garneau Arm Warmer 2 Large WhiteLouis Garneau Arm Warmer 2. The benchmark set by Louis Garneau returns this season with new style options to match any jersey and short. Unstoppable HeatMaxx fabric provides just enough insulation while retaining SPF 50 against ultraviolet radiation. Biceps silicone gripper prevents the garment from sliding and twisting. Packs away easily for early morning jaunts.775504382753