Seac Wetsuit Hood Tekno Mens'-Ladies' 5mm Quality Neoprene - Scuba Diving, Snorkeling Wetsuit diving hood with Ultraflex construction for a greater freedom of movement Comfortable, smooth surface around the neck Anatomical shape ensures better adherence to wetsuit and a more effective seal 5mm Thermal Fiber lining is great for cooler waters (60 to 70 degrees F) the hoods seams are glued and flat lock stitched for added comfort