A dual layer mouthguard with a U-shape polycarbonate/EVA or elastomeric material skeletal base includes channels and ramps to ensure a uniform thickness on the occlusal, buccal and lingual surfaces of the teeth for proper alignment of the jaw and positioning for protection during the placement of the mouthguard. The liner is softer than the base when introduced to heat and remains softer as it is cooled. The base may also include metal/magnetic insertion to serve as a tethering device for temporary storage.
