PackFreshUSA: 5-Gallon (20″ x 30″) AirTight Seal-Top Mylar Bags for Long-Term Food Storage – Heavy Duty 5.5 Mil (Per Side) – Resealable – Heat Sealable – Food Grade – Rounded Corners – Pack of 50

Our bags have rounded corners to protect your other stored items from puncture or damage. The strong mylar film has a burst strength of 70 psi, equivalent to the weight of 2 1/2 cinder blocks per square inch. These bags are strong, durable, and easily seal with a vacuum-sealer, iron, or hair-straightening iron.
This bag has a Seal-Top feature similar to sandwich bags. Seal-Top Mylar bags allow for opening/closing after tearing the heat seal portion to keep product fresh. For the longest term storage, heat seal above the zip seal.
LL Mylar bags MUST be heat-sealed for food storage. A seal-top is only for resealing food after you open it.
5.5 Mil Heavy Duty mylar bags provide a substantial increase in puncture protection, improved durability, and greatly increase long-term oxygen and moisture resistance. Superior oxygen barrier provides over 100 years of protection.
INCLUDES: 50pcs of 5-Gallon (20″ x 30″) 5.5 Mil Heavy Duty Seal-Top Mylar bags and Long Term Food Storage Guide