The O'Brien 4-Belt Pro Vest is designed with both comfort and safety in mind. This life jacket is made with high-quality nylon and a flexible foam core to ensure peak performance. Oversized arm holes create a relaxed fit with a wide range of motion. The 4-belt design ensures a secure fit and feel. USCG approved type III. Chest SizesXS: 28"-32"S: 32"-36"M: 36"-40"L: 40"-44"XL: 44"-48"2XL: 48"-52"3XL: 52"-56"4XL: 56"-62"5XL: 62"-68" Soft, flexible foam core for extra comfort 4-belt construction for secure fit & feel USCG approved type III | O'Brien Men's Nylon 4-Belt Pro Vest