K2 Union SuitThe Immersion Research K2 Union Suit is a full body fleece layer that features IR's K2 fabric, a light weight Polartec grid fleece thats still remarkably warm and dries lightening fast. The neck and shoulders are made with a super stretch neoprene that allow you to climb into the suit via the neck hole no zippers necessary. It can be worn under a drysuit, or even matched with a dry top and paddling pants or shorts. If youve never owned a Union Suit