Lateral Jaw Stabilizers Protect the lower jaw from side impacts Tether Removable helmet tether included Compression Fit System Promotes easy and precise molding for a super tight for on lower teeth Central Fit Slot Provides a secure low profile fit for improved speaking and breathing M.O.R.A. Performance Enhancement When fitted and worn correctly, the Shock Doctor Gravity Mouthguard positions the lower jaw down and forward, and the tongue up into the roof of the mouth (M.O.R.A. position). A Mandibular Orthopedic Repositioning Appliance (M.O.R.A.) may increase strength and athletic performance in a wide range of sports