Neenahpaper #10 Envelopes for environment stationery #10 Envelopes for Environment® Stationery, PC 100 Natural, 500 per Box These envelopes are Certified Processed Chlorine Free (PCF) and manufactured with Green-e Certified renewable energy so your communications make a statement about your environmental conscience. Made from Earth-friendly 100% post-consumer fiber. Premium-quality that meets your business needs. Smooth finish looks great and adds a professional touch. Easy-to-use fully gummed flap produces a secure seal. Distinguish yourself by using coordinated stationery items (sold separately).