2NDS . Made of the same performance-ready, wicking fibers as your favorite SmartWool socks, SmartWooland#39;s PhD knit arm warmer keeps your hard-working guns in soft, itch-free comfort when the temps drop and that short sleeve tee is a tad too chilly. Available Colors: DEEP NAVY, ORANGE, BERRY, HORIZON BLUE, PURPLE DAHLIA, LIBERTY, PERSIAN RED, POPPY. Sizes: L/XL, S/M.