The A6-cards are usable in several occasions and we've made sure there's plenty of room on the back so you can tell your own story properly. We used PaperWise paper which is easy to write on plus it's better for our planet. PaperWise Natural is environmentally-friendly unbleached board made from 100% agricultural waste. This sustainable board with its very low environmental impact has a natural light brown colour. The postcards are delivered with six kraft envelopes, so you are all set to send them out to let stories happen to others!