Bubble envelopes we offer are made from high quality offset paper. The sides of paper are tight and the inside is filled with durable air bubble foil. Bubble envelopes have strong glue hidden under a strip on a flap (HK type of gluing). This kind of envelopes is mechanical demages and tear-resistant as well as makes a content safe during transport. We can offer 11 sizes of bubble envelopes from 11/A to 20/K. Bubble envelopes are necessary for courier and post offices. Our company guarantees the best qaulity and durability in best prices.