Emergency Zone 1 Gallon Long Term Food Storage Mylar Bags. 7 Mil Thick. 100 Pack Why are these long term food storage bags the absolute best on the market? Continue reading. Larger--at 10x16 inches, there is extra room to fit more food in or to give more room to seal Thicker--most bags are 5mil, 4.3mil or even just 3.5mil. This measures the thickness of material. These bags are 7mil! More Durable--The addition of a 4th nylon layer adds puncture resistence Organized--Each bag has a label for easy recording of contents and date