I have an O'neill Psychofreak back zip wetsuit for sale, size medium. It is 3.5mm all over, arms/legs/chest, and has xds-air neoprene which makes it extremely warm. There is one small dime-sized tear in the leg but it doesn't go all the way through. It has fluid sealed seams and a back-flap to minimize flushing. I wore it all the way through last winter at Wrightsville Beach. $115 OBO, I would rather not have to mess with shipping.