Features: Engineered with high densities ethylene vinyls acetate foam and ergonomic handgrip resistance rings, this swim training buoys delivers superior comfort, durability, and muscle building water resistance for workouts. The light weight yet durability ethylene vinyls acetate construction features a skin friendly texture for extended use, while its compacts design ensures effortless portability to pools, beaches, or travel destinations. Ideal for fitness enthusiasts, competitive swimmers, and rehabilitation users aged 8+ seeking low impacts resistance training or therapies. Perfectly adapts to swim drills, water aerobics, or family recreation – from indoor pools to open water adventures. This multipurpose buoys meets rigorous safety standards for worry without use across all skill levels and activity. Specifications: Color:Five Choices Dimension:18x18x3cm/7.08×7.08×1.18in Component:Ethylene Vinyls Acetate Package Includes: 1pair Water Sports Resistance Rings note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.