Dry & Mighty bags are air-tight, industrial-grade storage bags. They use a puncture and tear-resistant plastic that is completely flexible for easy storage of any product. When combined with one of our sealers they provide an air-tight zip-lock seal keeping out air, moisture, and contaminants. The snap close top allows it to be re-opened and closed over and over. Their sturdy, square shaped gusset base also allows Dry & Mighty bags to stand on their own.