FIT SYSTEM: Gel-Fit (1) GEL-FIT™ LINER custom molds to teeth for a tight, comfortable fit (2) EXOSKELETAL SHOCK FRAME heavy-duty rubber shock frame with integrated jaw pads provides maximum impact protection for the teeth, jaw and brain (3) TRIPLE-LAYER DESIGN with integrated breathing channel creates maximum protection, fit and comfort LATEX FREE NOT FOR USE WITH BRACES IMPORTANT FITTING INSTRUCTIONS INSIDE