White Block 4 mil resealable bags are the economical choice for neatly organizing your products. These zip top resealable bags have white block area for convenient labeling. Use a marker, pen or pencil to mark the bag for easily identifying the contents of the bag without using a label. Bags are strong 4 mil made of virgin polyethylene film that meets FDA and USDA requirements and feature a single track zipper closure for easy opening and closing. Use these recloseable bags where you want to keep contents in a sealed bag and moisture free. Custom sizes and Custom printing are available upon request.