Syncro 4/3mm Chest Zip Fullsuit for boys from Quiksilver. Special features include Fit: Fullsuit, entry: chest zip, thickness: 4/3mm, F'N Lite neoprene: 16% lighter this neoprene is packed with air cells for the lightest of lightweight warmth, Dry Flight far infrared heat technology thermal lining retains body heat by conducting it back into the lining and a composition of 92% Nylon/Polyamide, 8% Elastane.