Students love being able to wiggle while they work! The Bouncy Bands are made with heavy-duty rubber (free of latex and phthalates), increase concentration, release anxiety and can help to rest their feet. The Bouncy Bands for Chairs can be used with the small Kindergarten chairs and they also stretch to fit adult chairs. They can stretch to fit chairs that have a distance from 13-18" between the chair legs. Chairs can be lifted, moved and stacked, while the support pipes and bands stay secured.