HSTL GOGGLE | Skull ClassicMask and protective glasses HOSTILE HK ARMY SKULL PATTERN Made from a sturdy blend of thermoplastics, the HSTL Skull mask is ASTM certified to be bullet resistant. Its double screen prevents any possible fogging. FEATURES AND DETAILS: HSTL full face mask Removable comfort foam inserts on the upper and lower part of the mask. Quick change lens retention system. Adjustable, non slip head strap. Adjustable chin strap with quick release buckle. Vents