3/2mm mesh skin surf hood. Hood is constructed of 3mm mesh skin neoprene and bib is 2mm mesh skin neoprene. Hood is 100% sealed for virtually zero water penetration. Plus the mesh skin rubber exterior does not promote evaprotive cooling, so your head stays nice and toasty. Layer with a fullsuit and you have an instant hooded suit. Great for surfing, surf kayaking, kiteboarding, windsurfing, and other cold water/cold air watersports.