Lavacore is a technically advanced fabric, constructed and engineered exclusively for water sports requiring the ultimate in thermal control and superior comfort. This unique synthetic construction closely matches the stretch and movement of a traditional Lycia rash vest, while providing the insulation qualities similar to that of a neoprene wetsuit. Close to the skin, Lavacore's soft internal fleece and high 4-way stretch produces the ultimate comfort-warmth-weight ratio, a true leader amongst any fabrics within the water sports industry.