FIT SYSTEM: Instant Fit/No Boiling Required (1) 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 (2) 100% MEDICAL-GRADE SILICONE for ultimate comfort, no boiling or fitting required Meets NFHS High School wrestling rules requiring full coverage of upper brace brackets if an athlete has only upper braces. LATEX FREE IMPORTANT FITTING INSTRUCTIONS INSIDE