This is the Aqua Lung 7/4mm Dryhood FLEX Scuba Diving Hood Features: Glued and Blind-Stitched Seams to minimize water exchange and keep you warm Super-stretch neoprene on the thicker models for maximum comfort Face seal left unbound to allow for custom trimming Hanging loop for easy drying and storage Aqua Lung provides a variety of different hoods that can be worn with any of our jumpsuits. Ranging in thicknesses from 1.5mm to 7mm, the hoods come with such features as face seals that allow for custom trimming, unique vent designs to allow for release of trapped air, glued and blind stitched seams and hanging loops for easy storage. "