Under Armour Reactor 1/2 Zip Dont settle for a basic base layer. The Under Armour Reactor top keeps you warm, dry & comfortable for cold weather workouts. Finished with a black & white colour block design for a contrast look that stands out. Product Features Cold Gear Reactor insulation keeps you warm Soft, brushed areas of the fabric for added comfort Shaped hem for added coverage & a flattering shape Sweat-wicking material with anti-odour technology Thumbholes help to keep your sleeves in place, size XS