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Survivor R4440 ( QUAR4440 ): DuPont Tyvek Expansion Envelopes Make Your Important Documents Survive!. Durable—rip- and tear-resistant. Moisture- and chemical-resistant. Superior protection for bulky items. Use instead of cartons or boxes. Expands on sides to fit binders, books, reports Lightweight envelopes save on postage. Clean, bright white professional image. Self-seal Flap-Stik closure. Open Side, Heavyweight 100 envelopes per carton. First Class Green Diamond Border 10 x 13 x 2

99 Staples 10 x 15 Tyvek Envelopes White 14 lb Catalog QuickStrip Closure Item # 53493310 x 15 99 Tyvek Catalog Envelopes White 14 lb QuickStrip Closure - Remove strip and press to close Lightweight Tyvek Material Brand New in open and distessed box. Envelopes are not effected by the box condition.

Tyvek® exterior makes these envelopes almost impossible to rip or puncture. Lightweight material reduces mailing costs. These durable, reliable envelopes provide an extra layer of protection for your documents.

Tyvek Envelopes are super strong yet lightweight. Envelopes are moisture resistant and tear resistant. No lick Grip Seal Closure features makes them quick and convenient to use. 14 lb. Ideal for mailing letters and other written documents.

White Tyvek® mailer with a self-adhesive flap. Lightweight, moisture and rip resistant Tyvek® construction. Clean, crisp look. Flap-Stik® self-adhesive closure. Plain white, Air Mail and First Class formats.

50 New Plain White Tyvek Mailers/envelopes Sub 14 (middle thickness) R1580 10 x 13" - opens on the 10" side Who Makes TYVEK? Dupont is the only company that makes Tyvek. Some boxes are marked and some are plain. HOWEVER, the Survivor Series of Tyvek has markings on the envelopes themselves. These makings show the envelope is 'Tamper Evident' Tyvek, made by Dupont. ~~~TYVEK MAILERS -- Super Strong & Light weight! They pay for themselves at the scale! Waterproof - Moisture proof - Can't rip, tare or puncture - Ship anything with these mailers, from clothes to toys to books. Just bubble wrap item then bag it with Tyvek.