NeoSport Women's ION Racing Suit Should fit snug, but not too tight TRIATHALON WETSUIT: Racing wetsuit allows full range of motion for efficient swimming and energy conservation NEOPRENE: Super soft exclusive and ultra-light neoprene sleeveless wetsuit designed for racing. HIGH PERFORMANCE DESIGN: Extra-wide arm openings eliminate unwanted binding and allow full muscle flex. DESIGNED FOR SPEED: The neoprene material provides maximum buoyancy and glide; five-millimeter chest panel and three-millimeter back panel help you skim along top of water. REDUCED DRAG: Leg openings above knee increase kick efficiency and decrease drag, while wider exit opening curtails heel snag for faster transition times.