NOS (New Old Stock) Never Issued. Please read entire description -M10M Military Surplus Full Face Gas Mask Respirator w/ Hydration Straw Filters NBC Developed to protect against chemical (gas etc), biological (bacteria and viruses), radiological (nuclear contaimated) NBC threats – Set of Cheek diaphragm. 3 pairs of sealed filter inserts – Canteen adapter -M81 MOPP Gear sealed MED/REG Trouser -M81 MOPP Gear sealed MED/SHORT Blouse – New rubber gloves – used Canteen & Alice carrier – used gas mask carrier Alice compatible – used USGI LC1 Alice belt -used 2x Magazine pouch w/ grenade carries – used general purpose bag The M10M Gas Mask is the genuine article an authentic piece of military history. Perfect for your military gear collection, a reliable, inexpensive personal protection solution. In addition to the mask, you get an integrated drinking tube and canteen/water bottle adapter. CBRN M10M Army gas mask -Size 2 M-L – Includes drinking tube and canteen/water bottle adapter – Supple yet tough rubber facemask – Snug 6-point adjustable harness – Integrated speech diaphragm – Boasts oversized eyepieces – Developed to protect against chemical, biological, radiological threats Note: Though these gas masks and filters are NOS, new old stock, and may very well function as intended, though they have probably exceeded their expiration dates. These are Authentic USGI Surplus items in good condition any defects are pictured; tears/fraying/ delamination. Any musty odor from storage requires only soap and water. Excellent condition item sealed in plastic. The gas mask may smell rubbery and may be coated with an anti-stick compound. These issues are easily eliminated by washing in warm soapy water.