Xcel Men's Xcelerator 2mm Reversible Long Sleeve Top, Black/Cobalt Reversible to all black body with dark logo colors 2mm UltraStretch neoprene sleeves 2mm SuperStretch easy on and off back panel with a Nylon-lined front panel to prevent flushing Loop It Or Lose It! waist loop ties can be secured to boardshorts for a more secure fit Comfortable flatlock seams lie flat and smooth against your skin