O'Brien Men's Traditional Life Jacket Red 2XL New With Tags The Men's Biolite Traditional Vest from O'Brien has a biolite outer construction. Lighter weight than neoprene, the biolite material lets you enjoy longer riding sessions in comfort. Wide armholes give the rider freedom of movement. Zip closure and two belts offer security without hindering performance. USCG approved type III. Men's sizes: XS(28"-32"), S(32"-36"), M(36"-40"), L(40"-44"), XL(44"-48"), 2XL(48"-52"), 3XL(52"-56"). Please note: If you measure on the upper-end of the size range, it is recommended that you get the next size up. Biolite outer for extreme comfort Zip closure and two belts secure fit Designed for freedom of movement USCG Approved Type III