Designed for children learning to swim, the Progressive Back Float by Water Gear provides ample flotation, that's fully adjustable. With proper instruction and supervision, kids can learn to float on the back, swim with legs high, and tread water independently. Made from EVA foam, the float won't chip or water log. Measures 8 1/2 x 6 1/2 inches. Supports up to 50 lbs. Not a life-saving device. Never leave children unattended.