Tyvek Flap-Stik Open End Expansion Envelopes - 14lb. - 10" x 13" x 1 -1/2" - White - 25 Pack

A lightweight yet strong , water-resistant alternative to traditional envelopes. The virtually indestructible material protects from even the roughest handling, but at the same time is lighter than paper envelopes. It protects the contents against the elements and is 100% recyclable with an average of 10% of post industrial content.