Ziploc Brand Freezer bags are designed to help protect food against freezer burn Ziploc Brand Freezer bags include a Stay Open Design for easy filling Ziploc Brand Slider bags are stronger than Hefty on punctures and tears.* *Bag film tested using ASTM D1709 Dart Drop and ASTM D2582 PPT. Hefty is a registered trademark of Reynolds Consumer Products LLC, which is not affiliated with, and does not endorse, this product. EasyGuide helps you know your sandwich and snack bags are closed EasyGuide Seal: open and close your Ziploc Brand Sandwich and Snack bags with ease Help reduce food waste with Ziploc Brand bags