Bare 7/3mm Elastek Super Stretch Vented ColdWater Scuba Hood, Divers Hood, Scuba Dive Hood, Diving Hood Bare 7/3mm Elastek Super Stretch Vented ColdWater Scuba Hood 7mm neoprene with FULL-STRETCH ELASTEK material for ultimate stretch and comfort 3mm ELASTEK/GLIDESKIN trimmable face and neck seal glides nicely over your hair Vented to allow trapped air to escape - Coldwater flange is 3mm N1S Hood neck seal mates with drysuit seal/collar