Full protection keeps all teeth from grinding; cushioned bite pads keep front and back teeth from grinding like a full coverage guard; made with high performance durable material Ultra light slim design for ultimate comfort; easy breathe flex band goes behind teeth to allow open air flow and enables drinking and talking Custom fit molds to teeth for snug fit; bite pads mold to shape of teeth for custom fit The helps prevent the damage from nighttime teeth grinding. Two-layer design includes a soft top layer to cushion and absorb and a firm bottom layer to prevent grinding. The life of your dental protector will vary based on the force of your teeth grinding. It should last approximately six (6) months.Specification: Color: White. Size: About 4 x 4.5 x 2.5cm. Material: EVA. Package Including 4 x Tooth Grinding Guard