Cressi Air Travel 2.0 Travel BC 420 denier nylon, Light Weight, Very durable, Weighs only around 5.5lbs Back pad is a soft and comfortable,tank is securely fitted to the jacket with two straps Shoulder straps are very comfortable and supportive, Easy to adjust even in water Integrated Lock Aid weight system, Integrated weight system holds up to 20 LBS Chest strap can be adjusted to three different levels