The Palm Centre Longjohn features a unique colour coding system to denote size. This colour coding system makes it easy to identify the exact size suit, when they are hanging in a store with 100 other wetsuits. This is a great wetsuit for kayaking that is based around a 3.5mm neoprene construction. All of the seams are Mauser stitched for enhanced comfort and performance. In order to give a long and happy life the bum features a slightly heavier duty neoprene while the knees feature a PU print for added durability.