Hot Chillys Size Chart The MTF Zip-T is designed with performance in mind. Made with moisture transfer fibers with added spandex for a stretchy fit that adheres to your body, it provides all-season warmth and UV protection. This Hot Chillys baselayer features embedded odor-blocking 'Chilly seasonings' that inhibit bacteria growth and keep your clothes smelling fresh. Features: - Soft stretch elastic seam tape at neckline - Sleek, performance-friendly rubber tip zipper - Zip-through collar with interior wind flap for ultimate warmth - Sublimated prints to retain vibrant color and fabric properties - 100% Polyester proprietary fibers for a soft, cotton-like feel - Moisture Transfer Fibers to keep skin dry - Easy, comfortable feeling - UPF 30 protection - Midweight warmth, body fit design - Only available to ship within the USA