The Squid Lid protects sensitive areas from the cold but allows unrestricted freedom of movement. In 3mm mesh neoprene and with a stiff peak, this hat will shed the water and keep your eyes shielded from the worst of the elements. If you are looking to upgrade the warmth of your 5mm wetsuit for use in UK and Irish waters this could be the perfect item. Fabric 3mmUV protection Wind resistant single layer smooth skin exterior Lightweight Fluid foam single layer neoprene Washing instruction:Rinse with cool water and drip dry out of direct sunlight