Quality Park Tyvek Expansion First Class Envelopes

Expansion envelopes with heavyweight Tyvek offer superior protection for mailing bulky items which are not too heavy. Ideal replacement for costly box or carton. First-class envelopes feature open-side style and convenient Flap-Stik closure. Envelopes made of DuPont Tyvek won't rip, tear or puncture and are much stronger and more secure than traditional paper envelopes. Water-resistant, moisture-resistant envelopes are easy to use. Simply peel and seal.