Smelly Proof Storage Bags are designed to create an “ecosystem” that blocks vapors & oxygen from entering or exiting the nylon reinforced FDA Approved Poly. Smelly Proof bags, whether the smallest to largest come with a double-track zipper ensuring the tightest seal possible. Heat Sealable: Smelly Proof bags also have “tear notches” to be used with most all heat and vacuum sealers for freezing foods safely up to 6 months without freezer burn. Many Uses: Food Storage & Freezing Marinating Picnic, Beach, Camping & Catering Storing, Organizing & Traveling Snacks Dog Treats and Toys Ice Packs for Injuries Organize Jewelry Cigar & Tobacco Storage Garden Seeds and Supplies Emergency Preparedness Items