Hot Chilly's Micro Elite Chamois Solid Zip T Top is the ticket if you are looking for versatility. The Bio Silver anti microbial properties reduce bacteria and odor naturally and is specifically adapted to be used close to the skin. Featuring 4 way stretch, the Micro Elite Chamois Zip T provides full range of motion to improve performance and comfort. Rated 8 on the warmth factor thermometer, this crewneck is designed for excellent moisture management perfect for performing all day long.The soft knitting process does not chafe or cause irritation. They keep you warm on the coldest days, dry when things get intense. Features: Sleek, performance friendly Hot ChillysR logo rubber tip zipper Contrast flat seam construction Intimate blend of enhanced polyester and spandex fibers Moisture Transfer Fibers to move moisture away from the skin 4 way stretch for unlimited movement Smooth face for easy layering Soft to the touch Comfortable, non binding Undeniably warm Body fit design for next to skin performance fit Active to aggressive lifestyle styling UPF 30 protection Technology: MTF Moisture Transfer Fibers: Hot ChillysR exclusive MTF technology moves moisture away from your body, keeping you warm, dry and comfortable. Bio SilverR: anti microbial treatment uses state of the art technology with intimately blended yarns to prohibit odor causing bacteria. This fabric incorporates non abrasive, soft feeling yarns with permanent, silver based properties to help trap and eliminate body odor.