True Liberty?? Bags are the original all-purpose home and garden bag. These bags are used by commercial organic farmers, food storage experts and hobby growers to keep their foods fresh, healthy and delicious. True Liberty?? Bags are safe to use in your conventional oven, freezer, rice cooker, slow cooker or stove top, as they are resistant to cold, heat, fat, grease, oil and water. True Liberty?? Bags have an excellent aroma barrier, which makes for a fantastically versatile, all-around home and garden bag. BPA-free material and burst, tear and puncture resistant. Thickest bag of its kind.