FREEMAX neoprene on the body and legs which adds durability, along with HYPERSTRETCH 3.0 in the arms and front lower legs for optimal range of motion and comfort in key areas. Other features include: Neoprene: Standard FREEMAX on the body and legs. HYPERSTRETCH 3.0 in the arms and front lower legs (key areas) Seams: Glued and blindstitched seams to ward off windchill, keep cold water out, and lock heat in Entry: Full back zipper for easy entry/exit Adjustable neck closure, Durable kneepads