POC takes the humble hydration pack and catapults it into the 21st century with seamlessly integrated spine protection. It uses their same VPD armor they use in their DH pads. It's lightweight, ventilated and flexible when moving, then turns rigid upon impact. The pack itself uses ergonomic straps and a comfy elastic waistband so it carries well while on the bike. Organization is easy with a plenty of pockets and separate compartments for the removable back protector, bladder, and even a helmet pouch that fits a full face.