Booklet Envelope, 6" x 9" White Wove. 1,000 Envelopes 1,000 Top Quality Booklet Style (Open-Side) Envelopes. Made of Durable 24 lb. White Wove Paper. White 92-brightness. SFI-Certified paper. Works in almost all Inkjet and Laser Printers! Moisture activated gummed seal.