Caldwell Range Plugs w/ Cord 31 NRR 10pk. These ear plugs manufactured by the experts at Caldwell feature a tapered shape made of a polyurethane foam to make them easy to insert and comfortable for hours of use. Never lose your ear plugs again with the Caldwell Range Foam Ear Plugs with Cord used in conjunction with the provided to clip to snap on the back or your hat or the collar of your shirt. Specifications for Caldwell Range Plugs w/ Cord: Manufacturer: Caldwell NRR: 31 dB Quantity: 10 Pack Size: One Size Color: Orange Features of Caldwell Range Foam Ear Plugs with Cord: NRR 31 Tapered design makes the plugs easy to insert Polyurethane Foam makes the plugs comfortable to wear Cord and Clip make it extremely east to keep track of Screw Cap bottle makes storage of un-used plugs extremely convenient Package Contents: Caldwell Range Ear Plugs w/ Cord & Clip Caldwell 568231: Range Plugs w/ Cord 31 NRR 10pk