Onyx MoveVent Curve Life Vest is one of the most comfortable vest ever! Finally a life jacket that won't hold back your paddle sport enjoyment. Onyx's revolutionary MoveVent Life Vest is sculpted to give you total freedom of movement as you paddle plus is crafted to maximize venting so you can stay cool through the most strenuous exertions. It fits like a glove, floats like a life preserver and cools like central air.