Thunder Bolt lip guard is ready to dominate in a flash with a no-boil, instant fit and a heavy-duty permanent tether so you're always locked in. Features LOCKED IN - Heavy duty permanent tether strap securely attaches to helmet BREATHE EASY - High-flow BOLT airflow breathing channel for easier, deeper breaths MAKE AN IMPACT - Full protection for your teeth and lips READY TO GO - No-boil, instant-fit right out of the box BRACES - Works with braces PROTECTED - $50,000 LIMITED DENTAL WARRANTY MADE TO FIT - One size fits most