This is the Sharkskin Men&';s Chillproof Short Sleeve Shirt Exposure Garment for Scuba Diving, Surfing etc. Features: This short sleeve top is for when the conditions dictate or arm maneuverability is a priority It uses the same neck seal as the long sleeve top Perfect as an extra layer under wetsuits when the water gets chilly Sharkskin Chillproof is an aquatic specific, windproof 3-layer composite material that has been developed for water sports athletes. The comfortable micro fleece layer is next to the skin and wicks moisture and sweat away from the body to help keep you dry. The second middle technical layer is 100% windproof yet breathes to regulate body temperature while stopping windchill. The third outer layer is a nylon/lycra blend for abrasion resistance and 4-way stretch. It is also UV resistant for sun protection and has a durable water repellent finish (DWR) to provide a protective shell that sheds water. Sharkskin Chillproof is neutrally buoyant, anti-microbial, odour resistant, itch resistant and machine washable. PERFORMANCE GUARANTEE Authentic Sharkskin garments come with a 12-month guarantee on workmanship. Excludes fading and degeneration as a result of excessive exposure to chlorine or sunlight. We guarantee Sharkskin will perform as advertised.