IST Farmer John and Step-in Jackets provide superior warmth and comfort, keeping you safe and dry in even the coldest of waters. An adjustable fit, along with durable and flexible components, provide unrestricted movement and freedom, perfect for a great day out on the water. The two pieces suits are made from neoprene, a synthetic rubber material that provides insulation and protects the wearer from the cold water. They are also both designed to fit snugly against the body to prevent water from entering and to maximize thermal efficiency. This style of wetsuit is popular among surfers, divers, and other water sports enthusiasts because it allows for a full range of motion in the arms and shoulders, while still providing protection and insulation for the core and legs.