【STRONG BUBBLE PADDING】Usable size: 8.5x11 inch.These padded mailers hardly to be punctured that can withstand various extrusion and shock during shipment. Just the bubble are made with 16 layered polyethylene sheets. Provide an excellent protection for shipment though they are lightweight.

【SELF-ADHERING ENVELOPES】The poly bubble mailers come with a self-adhesive tamper-proof seal. They provides a reliable, tamper-evident tight seal to secure all enclosures. It cannot be opened without visible signs of tampering. CAUTION: sticky closure should be adhered in 1 minute.

【WATERPROOF ENVELOPES】These Padded Bubble Envelopes are laminated to make them completely waterproof. Providing the items with an umbrella anywhere.

【WIDELY USE】The envelopes are strong and you could mail small fragile items, lipsense, business card and etc. The quality of the mailer will hold up them in shipping well.

【SAVE SHIPPING COSTS】Those padded mailers are lightweight mailing envelops, will not add to your shipping cost.