The Base Layer can be used as an outer layer or as an inner layer underneath the wetsuit. In temperate waters, it can be used as an outer layer, protecting you from the cold and the sun without any restriction thanks to its elasticity. In colder temperatures, it is the ideal accessory to wear underneath your wetsuit while swimming in open water. It has a pattern specifically designed for women, which conforms to the body's shape for greater performance and comfort. Features: MATERIALSThis garment is made with 1.3 mm neoprene and a nylon inner lining for maximum elasticity.