Made from low density polyethylene and can be recycled. These white block ClearZip bags feature impressive clarity and make storage and organization simple for industrial, food service and medical industry applications. Reclosable and resealable and meet FDA/USDA requirements for use in food packaging and storage applications. Heavy duty plastic zipper bags that feature a white block area for organizing, packaging, and storage items. The white block area on these plastic zip bags accepts rubber stamp, marker, grease pen, or ballpoint pen.