iMBAPrice Poly Mailers Shipping Envelopes Bags, 10 x 13 - inches , 100 Bags (White) iMBAPrice (Pack of 100) 10" x 13" white poly mailers "Quick-Seal" adhesive strip - Easily close and ship your envelopes, no licking or water needed 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. Heavy-Duty Weather, Tear, and Puncture Resistant - won't bust or break open, even if over-packed.