Even in the era of e-mail, a whopping 20 billion postcards are mailed around the globe each year. Woodhi has revisited the humble postcard and turned it into an eco-friendly keepsake you can post, collect, or display. Each card is made of sustainably sourced and untreated maple wood, featuring wood ring patterns as unique as your fingerprint. Woodhi is an environmental steward, and participates in replanting programs so that maple wood trees can be enjoyed by the many generations to come.