Sending out something important? Then you need to send it in a Tyvek® envelope. Lets get technical for a sec...these envelopes are made from a spunbond olefin fiber bonded together by heat and pressure, its a material so strong and durable, it easily withstands the most grueling conditions. In fact, it is virtually indestructible! Ours are made from the 68gsm and are Zip Seal (Peel n Seal) and open Pocket (on the short edge).
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