Oneflex Steamers are made of a strong but stretchable 5 mm Nylon II Neoprene Rubber with a tough nylon lining with a new anti-abrasion material on the knees, perfect for an all-round entry-level wet suit. Oneflex suits offer comfort and long life with intensive use. All seams are glued and sewn for added strength and warmth. Back zipper with dam to reduce water exchange, pre-bent anatomical legs and arms help reduce fatigue, and Powerflex, an abrasion resistant fabric, is applied to suits seat and shoulders.