The Phenom Hexa-Flow Mouthguard 4.0 is our most advanced mouthguard yet-completely redesigned for elevated performance, comfort, and durability. From the streamlined airflow channel to the bold shard texture detailing, every element has been reengineered to meet the demands of today's athletes. Features All-new loop strap design - stronger, cleaner, and easier to attach Hexa-Flow breathing channel for maximum airflow No-boil, instant fit with secure bite zone Textured shard shaped grip and bold PHENOM branding for a premium look One size fits most; compatible with braces *WARNING: This product does not claim to prevent any injury that may occur in the sport of football due to its violent nature.* Warranty Information: 52 Day Defect Free Warranty All materials used in Phenom Elite cleats will be free from defects, and Phenom Elite provides repair or replacement, free of charge, for any defective merchandise.