Material: high density eva foam Size/color: as you request Feature: 1.Made from EVA foam, providing buoyancy and low water absorption 2.Work your upper body as well as your lower back and abs for a total fitness workout 3.Suspends you vertically in water to create a unique exercise experience. 4.Water-based training burns caloriesthe greater the resistance in the water, the higher calorie burn youll experience. 5.Warning: Not to be used as a flotation device. For ages 14+