This is the current issue Avon M50 gas mask.  Includes the carry bag.  The filters are supplied, but they are on the mask and not sealed.  The filters can be changed under continuous use, these are not the NATO 40mm cartridges.  This mask was previously issued but in excellent working condition.  The Avon M50 is among the lightest and most comfortable masks there is.  This is an adult small mask, but please note these are adult sizes and will not fit children.  The hydration system of these masks requites a Type A connector for canteens and bladders.