Heavy duty plastic 6 Mil Ziplock Bags are our thickest ziplock bags and are ideal for packaging, shipping, and storage of your sharpest and heaviest items in these clearzip poly bags. These heavy duty Clear zip lock 6 Mil plastic bags greatly reduce the possibility of tears or punctures and protect the contents under heavier use and re-use. The side-welded 6 mil zipper top bag seal reinforces the zipper for added strength and insures these 6 Mil ziploc bags are resealable and reusable, no matter how many times the bag is opened and closed. Use the Clearzip 6 mil poly zip lock bags when impressive clarity, durability, and strength matter. 6 mil. heavy ziplock bags are perfect for food.