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