Each card is hand illustrated, then offset printed with vegetable based inks on the highest quality felted paper. We strive to use sustainable, and recycled materials whenever possible, and always print in the USA. Our envelopes are made from 100% post-consumer paper bags. Please consider using our Kard Klasp stickers or going without plastic sleeves on your cards. ♻️ See "Plastic Free / Ship Cello Free / Kard Klasp or Naked" listing for more information. We have recently switched to bio sleeves made from plant-based PLA.