This is the XS Scuba 5/3mm Pyrostretch Temperate Water Hood Scuba Diving Features: Finally, a hood you won't hate putting on 5 mm neoprene hood with 3 mm bib Made from our finest PyroStretch neoprene Vented top panel to prevent trapped air Soft, comfortable fit Hood is manufactured with nylon-2 neoprene rubber, has a 5mm hood with an extended 3mm bib for layering with your exposure suit. All seams are glued and sewn for warmth, strength and durability. All edges are taped and sewn for a clean and durable look.