The STC (Super Tight Compression) Gel-Fit Mouthguard from Shock Doctor is designed specifically for use by baseball and softball players. The gel-fit liner custom molds to teeth for a tight fit while the new lightweight shock-transfer core profile fits closer and directs impact away from the front teeth. Designed for easier breathing and speaking, which may also increase airflow and enhance performance. Super Tight Compression Gel-Fit Shock Transfer Core MORA Performance Enhancement Ultimate Protection in a compact size