Syncro 1mm Long Sleeve Neosurfshirt for Boys from Quiksilver. Special features include fit: long sleeve, entry: pullover, thickness: 1mm, F'N Lite neoprene: this neoprene is packed with air cells for the lightest of lightweight warmth, Thermal Smoothie Neoprene: Wind & water repellent whilst remaining more flexible than ever and a composition of 92% Nylon/Polyamide, 8% Elastane.