2 Official SealLine USMC Military Dry Sack Bag ! - MAC Sack, 2 bags, USMC Military MAC Sealline Sack Waterproof Dry Bags. Still sealed in USGI vendor package. 210D oxford nylon with polyurethane coating Airtight compression sack, purge valve system Diameter 7 in / 18 cm, Height 13 in / 33 in...