Top in neoprene Magic Marine made by M-Flex, 1.5 mm 70%; it is ideal for the drift. Airprene flowzone back offers a cooling function additional for maximum comfort and breathability. Soft Neoprene and intelligent distribution of the thickness were used in the design to improve performance. Can be worn as a single layer against the skin or as an outer layer for extra protection from wind and water. Combine that with a long-john in the boat where maneuverability is key.