neopreneMaterial - This surfing hood is made of 2.5mm neoprene, which is thick enough to give you insulation from cold water in the winter, not only keep your head warm and dry, but also keep cold water out of your ear. and can protect your head from sun burning, ideal for industrial diving, snorkelling in cold winter, surfing, and more.Comfortable to Wear - Stretchable design, fits snugly and easy to put on and take off. recommend to wear it under the wetsuit to cover the bid which is more conductive to keep warm.2.5mm Neoprene Scuba Hood - This scuba dive hood is designed to reduce drag in the water, provides uv protection and warmth for your head and neck in cold winter, so you can enjoy endless fun of water sports freely, can also protects your head from sun burning.Wide Application - Awesome neoprene diving hood for various water sports, such as surfing, swimming, sailing, snorkeling, kayaking, canoeing, rafting, and more. great gift for your loved one.