These Leakproof Zip Style Bags that are secure for long-term handling and storage of it's contents. The Double-Locking zipper is airtight and water-tight. The patented manufacturing process eliminates leaks and offers unprecedented safety and leakproof ability. The double-track zipper is easy to close. The sizes are appropriate for use as a primary container for most diagnostic specimens. Reclosable Leak Proof Plastic Bag Double Lock are manufactured from durable 3-mil Serinex material which in turn provides an exceptional vapor barrier and odor control