This long sleeve top is designed for optimal utility and provides exceptional core warmth in cooler conditions. It can be worn alone or as a layering piece. With AQ-TEC's thermal protection technology, this top offers superior warmth and durability. It features a full-front YKK salt resistant zipper for easy on and off. The long sleeves provide added warmth and abrasion protection during various activities such as surfing, windsurfing, kayaking, free-diving, and scuba diving.