SINEDY Boating Swimming Flood Polyester Foam Life Preserver Jacket Vest Protector Whistle Foam Prevention Material: Polyester, Foam. Adopt EPE high buoyancy foams and make it produce a greater buoyancy in the water. Adjustable waist design allows people to wear it comfortably. Size: L(58x36cm), XL(60x38cm), XXL(62x40cm).