FIT SYSTEM: Instant Fit/No Boiling Required. INSTA-FIT™ a special Ortho-Channel fits around brace brackets and adapts to changes in tooth position as braces are adjusted, providing an instant fit and protection from lacerations. 100% MEDICAL-GRADE SILICONE for ultimate comfort, no boiling or fitting required. Meets NFHS wrestling rules requiring full coverage of upper brace brackets if an athlete has only upper braces. Latex free.