50 - 19x24 Lightweight High Quality Self Sealing Tear & Puncture Resistant Poly Mailers Envelope Bags by Unlimited Poly 2.6 Mil high quality self sealing mailers, 3 layer co-extruded polyethylene film High strength seams allow over-stuffing Water tear and puncture dirt resistant Pressure sensitive adhesive provides a high strength durable closure White outer surface & silver inner layer provides confidentiality Contain tear strip for quick and easy opening