Feature: Choose your Pack of 100 – 1000 poly mailing envelopes self sealing mailers 14.5×19, 12×15.5, 10×13, 9×12, fits a wide variety of items Self-sealing adhesive for quick and easy packing of items White outer surface & black inner layer provides confidentiality. Non-padded yet durable for minimal weight and volume Water, Tear and Puncture resistant. Superior tear and puncture resistance.100% recyclable. Pressure sensitive adhesive provides a high strength durable closure, water and dirt resistant High-efficiency mailers are perfect for shipping a wide variety of non-fragile items. Waterproof USPS, UPS, DHL and FED-EX approved.