Hot Chillys Women's Micro-Elite Chamois Crewneck Long Sleeve Base Layer Shirt - Micro-Elite Chamois has been the leader in body fit, technical base layer for years by incorporating intimately blended fibers with specific attributes to continuously keep you warm, comfortable and dry. Intimate blend of enhanced polyester and spandex fibers Moisture Transfer Fibers to move moisture away from skin UPF 30 protection Crew neckline with self-binding Thumbholes Seams set away from shoulder for added comfort Smooth face for easy layering Napped back for extra warmth and softness Four way stretch for unlimited movement Bio-Silver Odor Blocking properties Midweight warmth Style: HC9908