Ultra-flexible PVC foam and over-the-head entry make the Vibe one of our most comfortable jackets. The Vibe's low-profile front and racer style back give you full range of motion for sailing, SUP, or whitewater paddling. The Vibe was designed with loops on the back of the jacket and an attachment point inside the tunnel pocket to make the PFD compatible with our SUP Leash Release Belt (sold separately) for SUP river-running. For added safety, there is reflective trim on the shoulders, front, and back of the jacket, and a signal whistle tethered to the front mesh pocket.