Quality Park Products Corporation - Tyvek Expansion Envelope, 14Lb, 10"x13"x2", 100/CT, White - Sold as 1 CTRegular-weight Expansion Envelopes offer superior protection for mailing bulky items which are not too heavy. Ideal replacement for costly box or carton. Offers open-side style and convenient Flap-Stik closure. Envelopes made of DuPont Tyvek won"t rip, tear or puncture. Much stronger and more secure than traditional paper envelopes. Expansion Envelopes are water-resistant and moisture-resistant. Easy to use. Simply peel and seal.Sold as 1 CTManufacturer: Quality Park ProductsTotal percentage of recycled content: 0Post Consumer Waste: 0Country of origin: US