This might be the most ultra-engineered arm warmer on the market. Rather than a single panel of Roubaix fleece, the CapoForma CSS Arm Warmer has an upper panel, a lower panel, an articulated elbow, flat-lock seams, and a silicone gel gripper to hold everything securely. Beyond that, these warmers use Windtex Topazio fabric -- a stretchy Windtex -- to keep the windward portions of the arm warm. You also get Super Roubaix fleece for comfort, warmth and breathability where the wind doesn't hit. The color is Black. Sizes are S/M and L/XL.