Xcel 2mm Long Sleeve REVERSIBLE XCELERATOR Wetsuit Surf Shirt neoprene, ultrastretch Elastic cord side cinch and front loop to tie to boardshorts to secure top from riding up. Reversable! Two killer colors for the price of one! Super light nylon 2 front to prevent over-stretching and filling up with water. Contoured sleeve for maximum comfort and performance. 2mm UltraStrech collor.