Ultra-flexible PVC foam, a racer-style back, and a Z-Strap cinch system provide a comfortable and secure fit. Loops on the back and attachment points inside the tunnel pocket are compatible with Mustang's SUP Leash Release Belt (sold separately.) A single mesh pocket holds your essentials. Additional safety details include reflective trim on the shoulders, front, and back, along with a tethered whistle. The Vibe PFD is approved for Harmonized Level 70 in the USA and Canada. It meets the minimum life vest buoyancy of 15.7 lbs.