Columbian Tyvek Catalog Envelopes, 10x13, White, 50/Box

Durable Tyvek® envelope resists punctures, tears and moisture. Grip-Seal® closure is simple to use -- just peel and press for secure mailing. These lightweight mailers reduce shipping costs. Envelope Size: 10 x 13; Envelope/Mailer Type: Catalog; Closure: Grip-Seal® Self-Adhesive; Trade Size: N/A.