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Stack of 100 white Tyvek envelopes with green First Class markings 9 by 12 inches

DuPont Tyvek

DuPont Tyvek TYF0912FC Flat Envelopes 9x12 First Class White/Green PK100

SKU CH-AZRR-9EQW8

Pack of 100 flat envelopes measuring 9 by 12 inches for first-class mailing

  • Product colorWhite/Green
  • Tyvek material resists tears and moisture during transit
  • 9 x 12 inch dimensions fit standard documents without folding
  • First-Class markings speed postage processing
  • White exterior with green border simplifies address visibility
  • Pack of 100 envelopes supports high-volume mailing needs

DuPont Tyvek Flat Envelopes 9x12

These DuPont Tyvek flat envelopes measure 9 by 12 inches and arrive in a pack of one hundred. The white and green design meets First Class mailing requirements. They suit offices, retailers and anyone sending documents or lightweight goods that need tear-resistant protection.

Durable Tyvek material for shipping

The Tyvek construction resists tears, punctures and moisture far better than standard paper envelopes. Its lightweight structure keeps postage costs low while the material stays strong through automated sorting equipment. No special handling or extra padding is required for normal use.

Pack of one hundred ready to use

Each box contains exactly one hundred envelopes so high-volume shippers can load mail stations without frequent reordering. The self-seal closure speeds up packing lines and removes the need for tape or moisteners. First Class markings are pre-printed for quick acceptance at the counter.

How it compares

Measured against everything we stock in Packing Materials & Shipping Labels, at today’s prices. Recalculated every night.

Price $67.99
Pricier than about 56% of the 3,067 comparable items (median $52.99).

Specifications

Product
Brand nameTYVEK
Product colorWhite/Green

Questions about this item

How do I seal the 9x12 envelope so it meets First Class requirements?

Peel the protective strip to expose the adhesive, press the flap firmly along the full length, and ensure no contents shift past the sealed edge.

When should I replace an envelope from the 100-pack if it shows wear?

Discard any envelope with tears, punctures, or a flap that no longer adheres cleanly; the Tyvek material resists moisture but loses integrity once torn.

What thickness limit will I hit first when stuffing these 9x12 flats for First Class mail?

First Class flats must stay under 3/4 inch thick; exceed that and the piece becomes a thick envelope or parcel with higher postage.

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