Abstract: In a wet suit having a lower trunk portion, leg portions integral with said lower trunk portion, upper trunk and neck portions, and first and second arm portions integral with said upper trunk and neck portions, the improvement comprising:(a) said upper trunk and neck portions including a first section integral with the first arm portion and a second section integral with the second arm portion, the first section defining an opening to pass the second arm portion therethrough, the sections being relatively separable to provide access to space enabling user body entry relatively downwardly into the wet suit,(b) one section overlapping the other section when the suit is worn by the user to seal off between the sections.