10 x 13 x 1 1/2" First Class Expandable Tyvek Envelopes. Tyvek envelopes provide superior puncture, tear and moisture protection. Constructed from 18 lb. olefin. Ten times stronger than paper envelopes. Envelopes expand to hold bulky items. Feature...
10 x 13 x 1 1/2" First Class Expandable Tyvek Envelopes. Tyvek envelopes provide superior puncture, tear and moisture protection. Constructed from 18 lb. olefin. Ten times stronger than paper envelopes. Envelopes expand to hold bulky items. Feature...