The Long John ZIP is made of 3mm double-sided neoprene, ideal for canoeing, surfing, SUP, and sailing. 3mm neoprene with flat seams, Supratex reinforcements at the knees and buttocks to enclose the seam, YKK double-slider zipper on the chest and ankles for easy opening. This unisex cut, allows this Long John to be adapted to all body types. The Long John is more comfortable to use for these sports because the constant movement of the arms can create irritation at the level of the arms in a full suit. This model is color coded by size.