This Wake vest from O’Brien features a Biolite construction with Glideskin outer for ultimate flexibility and comfort. Lighter weight than neoprene, this vest features a full front zipper for easy on/off action. Oversized armholes increase range of motion so you don’t feel restricted on the water. Not USCG approved. Sizes: XS(28″-32″), S(32″-36″), M(36″-40″), L(40″-44″), XL(44″-48″), 2XL(48″-52″).