The Open Wide Mouth Rest is an indispensable tool for keeping the mouth safely and reliably open for daily oral hygiene. It is generally used when a caregiver is brushing the teeth of another person. This easy-to-control mouth rest is made from a special latex-free, high-density foam that is difficult to bite through, with a rigid wooden core to add stability and strength. The Thick version has 40% more foam, to withstand more aggressive biting pressure. It is often used for large people with a strong bite.