The Gymnic Hop Ball is the very best quality in hopping balls! Made from the super strong, yet soft vinyl latex-free material for long lasting use and durability. It's a great exercise product for indoors and smooth safe outdoor surfaces. Promotes children's body coordination, balance, lymph circulation and provides a fun work out while hopping on the ball. A special patented handgrip safety handle gives your child something to hold on to while they bounce away! Inflatable with the Faster Blaster, sold separately. Hop Ball 45 measures 18".