SureSeal Sample Bags are gamma sterilized, leaving a virgin interior surface with no toxic residue from gas exposure. The bags are made of virgin polyethylene for excellent clarity and stregth. They meet USDA, EPA and FDA standards and are RNase-free, DNase-free and non-pyrogenic. Samples can easily be collected by removing the tear strip above the wire closure and pulling on the two external grip tabs to open the mouth of the bag to the desired level. Using the grip tabs ensures sterility and eliminates the risk of contamination from finger contact. Then, introduce the sample into the bag, flip or fold the bag three times, bend the wires and your sample is secure inside the airtight and moisture-sealed bag. The PVC tab that surrounds the stainless steel wire is extended beyond the wire ends to prevent puncturing of the bag.