Cressi Ladies 2mm Thermic One-Piece Zip Up Swim Suit for All Water Sports Swimming, Snorkeling etc. Cressi Ladies 2mm Thermic One-Piece Zip Up Swim Suit for All Water Sports Swimming, Snorkeling etc. Women's all-in-one suit that is shaped like a one-piece swimsuit Designed specifically for swimming, snorkeling and water sports in general It is made from double lined 2mm neoprene