{"product_id":"usgi-chemical-biological-mask-facepiece-m40-m42-second-skin","title":"USGI Chemical-Biological Mask Facepiece (M40, M42) Second Skin","description":"\u003cp\u003eThe US Genuine Issue Chemical-Biological Mask Facepiece (M40, M42) - aka Second Skin or Outer Skin - is in new unissued condition and sealed original packaging.  It comes in two sizes: Small and Medium-Large.\u003c\/p\u003e\n\u003cp\u003eThis component of the mask Mask partially or completely encloses the user's face and fits over the base skin of the mask assembly. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNSN\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall:\u003c\/strong\u003e 4240-01-413-1540\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium-Large:\u003c\/strong\u003e 4240-01-413-1543\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eButyl Rubber Material:\u003c\/strong\u003e Unlike the silicone facepiece of the M40 mask, the second skin is made of thick butyl rubber. This material provides superior resistance to penetration by chemical warfare agents, particularly blister and nerve agents, which can corrode or permeate standard silicone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContamination Protection:\u003c\/strong\u003e Its main purpose is to shield the inner mask from liquid chemical droplets, significantly extending the service life of the respirator and simplifying the decontamination process.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSnug, Close-Fitting Design:\u003c\/strong\u003e The skin is molded to fit tightly over the outside of the mask's facepiece. It includes small rubber tabs at the forehead and chin areas to secure it firmly and prevent it from slipping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize Versatility: \u003c\/strong\u003eWhile the small size requires its own specific skin (NSN 4240-01-413-1540), the Medium\/Large skin (NSN 4240-01-413-1543) is designed to fit both medium and large facepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility: \u003c\/strong\u003eIt is fully compatible with the standard M40 and M42 series components, including the voicemitters and filter mounts. It is often issued alongside clear lens outserts and protective hoods to provide a complete seal.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Revolution Depot","offers":[{"title":"Black \/ Small","offer_id":48747338236131,"sku":null,"price":54.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Medium-Large","offer_id":48747338268899,"sku":null,"price":54.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0788\/8558\/5123\/files\/4240-01-413-1543_05.webp?v=1775683506","url":"https:\/\/revolutiondepot.shop\/products\/usgi-chemical-biological-mask-facepiece-m40-m42-second-skin","provider":"Revolution Depot","version":"1.0","type":"link"}