The 5.11® Comfort Mask is built with three layers for comfort and easy wear – an outer lightweight polyester fabric, a middle SMS filtering layer and a moisture wicking inner lining with antibacterial properties. Soft and stretchy ear loops and a thin nose wire provide a comfortable fit. mask_sizing_guide All mask sales are Final Sale, no returns. Light weight SMS filtering middle layer Moisture wicking, soft lining Comfortable and stretchy ear loops Mask does not replace CDC or WHO guidelines - Keep your social distance Wash prior to initial wear and after use Intended for general, non-medical purposes Not intended for use by health care professionals Not intended for use in a health care facility or environment Material : Shell = 100% polyester, Internal Filter = Meltblow Spunbond, Lining = 100% Polyester