4fit Wetsuits Men's 1.5mm Long Sleeve Top Rashguard Crew Sweat shirt Weight loss Made by Neoprene 1.5mm 100% UltraFlex DS Neoprene Long Sleeve Crew Performance Fit - Skin tight Pullover no zip design.Protect your hide from rashes & plenty of warmth for serious sweat loss Layer under a full or hooded wetsuit for extra warmth