by Polartec® — Fabric with the warmth of Polartec®, combined with four-way stretch and a membrane for windproof protection. Aqua Shell® is designed to replace neoprene and spandex skins for many water sports by providing far greater comfort and increased warmth per weight. The 4-way stretch provides a non-restrictive fit along with easy donning and doffing. The polyester inner construction of Aqua Shell® provides a high warmth-to-weight ratio. Aqua Shell® is odor- and itch-resistant, non-chafing, and features outstanding sun protection (UPF 40).