solid foam – no center hole | Designed for the beach, swimming pool, light sabers, toys. Dozens of other uses for craft projects. | Great for a variety of pool games. Oodles of Noodles foam noodles are proudly made in North America and are safe and non-toxic. Certified ASTM F963-17 Compliant. | Closed cell design resist wear. All sizes are approximate because of the natural nature of foam pool noodles to expand and contract, which is normal. Recreational Use Only – These pool noodles are not a lifesaving device. These pool noodles are a toy and not meant as a flotation device for kids or adults.