These balls are made of and environmental friendly material, safe for you to use. They can help to promote the relief. Suitable for party, and leisure time, etc. A great gift for family or friends. Smooth surface, will not be deflated, good elasticity, safe to use, and comfortable feel of the product Features - Color: Red. - Material: PU. - Size: About 6.3cm. - Made of premium PU material, soft, eco-friendly, and odorless, safe to play. - Suitable for party, and leisure time, etc. - Bring much more joy to you - Can be used for gifts, decoration, promotional festival gifts, children's toys, adult vent toys, fitness toys for the elderly, men and women of all ages are appropriate - Reduces your pressure