The Palma ST 3mm are manufactured from a super elastic and ultra-durable 3mm thick Neoprene and Nylon to ensure warmth and comfort. Ideal for snorkeling and scuba diving. These short socks are great for either full foot or open heel fins. The socks are lightweight and a great addition to the traveling diver's gear bag. Socks are extremely comfortable equipped with a Rubber Grip Sole design to assist with Non-Slip on wet surfaces such as boat decks and slipper ladders. The Palma are built-to-last with glued-and-sewn seams for strength and durability. The Palma ST socks are designed in Italy by Cressi and made in China. Cressi has been an Italian brand pioneer in scuba diving, snorkeling, and swimming equipment since 1946. The product is covered by a 2-year limited warranty.