Ergodyne N-Ferno 6826 Winter Ski Mask Balaclava, Thermal Fleece, Detachable Two-Piece DETACHABLE Top and bottom pieces are detachable allowing for versatile wear between hat, balaclava and neck gaiter HOOK & LOOPS STRAPS Suspension straps attach to hard hat for increased stability LIGHTWEIGHT Thermal headwear that fits comfortably under a helmet or hard hat without feeling too bulky ONE SIZE FITS MOST: Strechable warm fleece comfortablly fits most heads to provide the ultimate winter protection and comfort. FULL COVERAGE WARMTH Long length covers face, nose, mouth, and neck while maintaining breathability