Roxy Womens Roxy 4/3Mm Syncro Gbs Back Zip - Fullsuit Arjw103039 F'N Lite neoprene: 16% lighter this neoprene is packed with air cells for the lightest of lightweight warmth Fit: Long sleeve fullsuit Thickness: 4/3mm Thermal Smoothie Neoprene: Wind & water repellent to keep you warmer, this thermal neoprene is 16% more flexible than competitors Glideskin Neck Seal: Ultra smooth neoprene liner for superior comfort along with a watertight seal