The Neptune hood itself has a 5mm. thickness to ensure the most important area has the most protection and stays warm. The bib and face seal are made of 3 mm. neoprene to provide more flexible areas.

The Neptune 5/3mm. Semi-Dry Neoprene Hood with Bib will keep you nice and warm on your scuba diving in temperate and colder waters, and gives extra protection with the bib that you can tuck underneath your wetsuit for extra warmth.