When the weather and water cool off, a helmet liner can make all the difference. The LARS cap seals heat in, while blocking the wind. It works as well as neoprene when we, better than neoprene when dry and it won't small bad like neoprene can. The close fit allows you to fit it under a helmet.
The cap is made of Aqual - extremely elastic, anti-allergenic fleece provides heat comfort on the inside while elastic PU coating on the outside has a waterproof function and adds to thermal insulation.