The A7 Envelope (5 1/4" x 7 1/4") in 30lb. Clear Translucent is a Vellum, see-through envelope that makes for intriguing mailers. With archival properties, not only can these envelopes showcase an invitation, but they can also be used to store documents and photos. Crafted from 100% pure cellulose fiber without resins or other transparentizing agents. Translucent, recyclable, acid free, and elemental chlorine free. Seal by convenient adhesive strip along square flap. Available printed or plain.