30Pack 8" x 10" + 1.5" Bubble Poly Mailers Shipping Envelopes Bubble Mailers Self Sealing Padded Envelope 30Pack/Bag. Features: custom-made, superior, shock resistance, eco-friendly, non-toxic Usage: post / mail / express packaging ， Excellent shipping protection for a wide range of semi-fragile.Internally cobered with waterproof film,to keep dry. Provides maximum air retention and cushioning power High-slip bubble cushioning material allows faster, easier product insert. Pressure sensitive adhesive on the flap is quick and easy to close, self-seal and tamper evident. Wide welding edges (10mm each side) offers additional strength and safety.