Hot Chillys Women's Micro-Elite Chamois Quarter Zip Long Sleeve Base Layer Shirt - Your go-to for base layer performance tops; the fabric's intimate blend of enhanced polyester and spandex fibers are made with exceptional stretch-ability, and feature Bio-Silver anti-odor silver properties for freshness. Seams set away from shoulder for added support; Zip through collar with interior wind flap for ultimate warmth; Moisture Transfer Fibers to wick away moisture from your skin; Four way stretch for unlimited movement; UPF 30 protection; Thumbholes; Midweight; Style: HC9730;