Aqua Lung Undervest Hood-Attached 2 5mm With an ergonomic shape and integrated aluminum coating the hooded undervest is the most advanced undersuit available from Aqua Lung. The aluminum coating acts like a shield and reflects your own body heat back to you keeping you warm during cold water dives. Enjoy a perfect collar seal created when the glide skin seals with the internal skin of your wetsuit keeping water exchange to a minimum. Features - 2.5mm superstretch 4-way neoprene with aluminum coating between the inside lining and the foam to increase heat retention - Collar in glide skin sticks to the internal skin neoprene of the wet suit and makes a perfect seal - Anatomic shape for a great fit - Environmental friendly features: neoprene free of P.A.H. (Polycyclic Aromatic Hydrocarbons) made from a non-petroleum based material with REACH (European Union standards) approved thread - Attached hood offers a face seal to limit the water entries and G2 Vent Technology that allows trapped regulator exhaust bubbles to exit while keeping cold water out.