Features: Soft, comfortable and flexible foam construction. Maintain your own float and vertical through a floating design optimized for balance and safety. Whether you are recovering from an injury or just doing aerobic exercise, you can easily perform low-impact exercises. Specifications: Material: EVA foam Size Adjustable with buckles Applicable People: 1.Adult who knows some swimming skill 2.Children Size: 61.5cm * 20.5cm * 2.5cm / 24.2" x 8.1" x 1"