When you just need a little not a lot. We got you covered. Our Syncro 1mm Hyperstretch II long sleeve jacket is a flat lock for plenty of comfort and flex. Get out there we've got your back. Short lower back zip for easy entry, boardshort tie loop. 100% Hyperstretch II neoprene. Warmth: 6.0. Flex: 8.5. For water temperatures: 69 degrees + Fahrenheit. Imported.