Our premium full-coverage mask in a tie-back style, the Sentry gives comfortable protection all day long. Two layers of high-density cotton provide the best protection while minimizing heat-trapping. The generously cut design gives any face shape full coverage without gaps. Embedded copper nose band bends for a snug, custom fit (and reduces eyewear fogging). Built-in pocket lets you add your own filter for additional protection. Our premium Sentry, full-coverage mask in a tie-back style, gives comfortable protection all day long. Sentry’s expert construction means you can wear your mask without adjusting it or touching your face. The two layers of high-density, 100% cotton and cotton/linen blends provide the best protection while minimizing heat trapping. Roomy construction leaves enough give to wear Sentry over an N-95 respirator.