All Prism Pak Brand reclosable bags are made of 100% virgin Low Density Polyethylene (LDPE) resin that meets FDA/USDA specifications. All Prism Pak stock reclosable bags are manufactured to full gauge specifications and offer exceptional clarity and reliable closure performance. Prism Pak bags usually ship within 24 hours. Prism Pak brand reclosables are engineered to rival any reclosable bag at economical prices. Prism Pak bags are perfect for standard, industrial, food, polypropylene and medical applications.