By staying hydrated, you can paddle much longer and increase metabolic efficiency. That is why we designed our jackets to safely accommodate hydration systems. Our Full Bladder is designed to hold up to 1.5liters of water within the back of your PFD. The Full Bladder is provided with special webbing and buckles to secure to your PFD. When installed, the bladder is securely concealed beneath the outer layer of foam, so there is very minimal exposure that could snag on overhanging objects. Bladder is high quality, non leaching plastic, made by Platypus®