10x13 inch poly mailers. Ideal for Quickly Shipping Clothing, Pants, Jeans, Leggings, T-Shirts, and Many Related Items. Extra thick cute mailer, Waterproof, Heavy-Duty Weather, Tear, and Puncture Resistant - won't bust or break open, even if over-packed. Made from recycled plastic- Polyester envelopes with Marble print. Quick-Seal adhesive strip - Easily close and ship your envelopes, no licking or water needed. Heavy-duty polyethylene make these envelopes highly resistant to water, dark inner lining for complete privacy while your items are in transit. Perfect for packaging up your Poshmark sales, Holiday, and Birthday gifts!