Orca Openwater Womens Wetsuit Base Layer - Black This Orca Openwater neoprene Base Layer is designed to be worn either as a base layer under a wetsuit in colder waters or as an outer layer in more in temperate waters. The 1.3mm Neoprene will protect your torso from the cold and the sun without any restriction of movement for swimming strokes thanks to its super flexible Yamamoto neoprene. In colder temperatures or chilly waters, it is the ideal accessory to wear underneath your wetsuit, adding extra 1.3mm of warmth where you need it most. Pair it with the many other Openwater range of Orca accessories to enhance your ocean swimming experience. Features: 1.3mm super stretch neoprene with nylon inner lining for maximum elasticity. Flatlock seams Women's Sizing: XS/8, S/10, M/12, L/14, XL/16