ALTA FILTER POCKET Face Mask with NOSE BRIDGE & Head Straps is constructed of 2 layers of fabric. This mask has a pocket for inserting the included flexible aluminum nose bridge, and a pocket for disposable filters sold separately.  FEATURES: 100% Cotton Construction For 2 Layers on Black, Khaki, and Gray Masks Nylon Outer Layer with 100% Cotton Inside Layer For Digital Camo Masks Elastic Head Straps for a Comfortable Fit Includes 1 Flexible Aluminum Nose Bridge for a Customized Fit Flat Face Design With Fold-out Flaps for Complete Coverage Machine or Hand Washable (Do Not Wash with Filters or Nose Bridge) Mask Can be Worn With or Without Filters or Nose Bridge Tumble Dry on Low Setting Nose Bridge Pocket Filter Pocket (filters not included)  One Size Fits Most NO RETURNS ON FACE MASKS - ALL FACE MASK SALES ARE FINAL NOTE: These masks are not meant for medical or clinical use and are not “N-95” or medical-grade masks. Proper use of these masks will not guarantee protection against COVID-19 or other diseases. Further, the use of these masks should not replace other recommended measures to stop the spread of COVID-19 or other diseases. Please continue to follow all CDC and other public health guidelines including practicing social distancing, washing your hands, and refraining from touching your face.