DuPont Tyvek TYF0912WS Flat Envelopes 9 x 12 in White PK100

DuPont Tyvek 9 x 12 Inch Envelopes

These DuPont Tyvek flat envelopes measure 9 by 12 inches and come in a pack of 100. They are designed for shipping and mailing tasks in office and mailroom environments. The white Tyvek material provides a clean, professional appearance for outgoing correspondence. This product suits businesses and individuals who need a reliable supply of durable mailers.

Easy to load and seal for high-volume mailing

The envelopes arrive flat and ready to use without assembly or special equipment. Simply insert documents, fold the flap, and apply your preferred adhesive or tape to seal. The smooth Tyvek surface accepts handwritten addresses, labels, and inkjet or laser printing without smudging. Common issues arise only if the flap is not pressed firmly after sealing, which can cause the envelope to open in transit.

Check document size and postal requirements before

Verify that your contents fit comfortably within the 9 by 12 inch dimensions without excessive folding or force. Ensure the weight of your filled envelope complies with the postage class you intend to use. Confirm that your printer or labelling method accommodates the envelope thickness if you plan to print directly on the mailers. Buyers who need padded protection or larger capacity mailers should consider other options.