Unissued Cold War Era Soviet GP-5 Gas Mask Kit. These gas mask kits are in unissued condition. Each kit includes the gas mask itself, 1 filter, 1 pair of spare lenses, and 1 gas mask bag. These masks are size small, indicated by the "1y" marking on the right side of the mask. It is recommended not to use the filter, since they are made from 7.5 percent asbestos. These would be great to add to any Soviet militaria collection.