Tyvek® Self-Seal Expandable "First Class" Envelopes - 10 x 13 x 1 1⁄2" (QTY./CASE 100) 12x9x2 Perfect for everything from birthday

Perfect for everything from birthday parties to brunches

with a unique design that provides superior protection from every angle

From the #1 doctor-recommended brand

and hypoallergenic making it a great choice for any skin type

Tyvek® Self-Seal Expandable "First Class" Envelopes - 10 x 13 x 1 1⁄2" (QTY./CASE 100) 12x9x2 Perfect for everything from birthdayDELUXEResist tearing, puncturing and water damage with these self seal mailers. Ship bulky catalogs, reports or paperwork. Ship twice as much in one envelope. Large opening for quick and easy packing. Tough, 18 lb. tear resistant olefin. RECYCLING: Recyclable Recycled Content: Post industrial: 10%