Stay warmer - float higher. The Anti- Gravity Shirt is Built to supplement the flotation of your PFD, lifting you higher without restricting your mobility. Our windproof Mystery material provides a thermal layer that is nice next to the skin and can be worn over other layers. Polyolefin-foam flotation panels are arranged in an ergonomic pattern in the front and back to move with your body as you paddle. A Great way to add flotation on big-H2O days or increase impact Safe guardion. Flotation: 10 lbs. This shirt provides supplemental flotation but is not a Coast-Guard approved flotation device. It is not intended to replace a life jacket.