The unique design of Clenchy™ makes it easy to hold and chew. It helps close the airgaps between your teeth and the clear aligners. Using your Clenchy™ regularly will insure you finish your treatment on time and desired results. The Clenchy™ does not retain moisture or produce more saliva like other products. Clenchy™ will last longer and make your aligner fit and feel better. The compact size fits in your aligner case to conveniently store and take on-the-go. Clenchy™ also helps with TMJ. Clenchy™ is made of a FDA registered Patent latex free material. It is flexible yet firm and does not lose its elasticity over time. Shelf Life: 365 days Country of Origin: USA