10x13 checkered Poly Mailers

10x13 Poly Mailers Unsurpassed Water & Tear Resistance. Superior side seams combined with Heavy Duty polyethylene make these High Quality envelopes highly resistant to water, punctures, and tears. Pressure sensitive self seal. Easy packing, tamper-evident, and super secure closure. Light Weight & Time Saving which translates to lower shipping costs combined with faster shipment preparation. 100% recyclable.