My husband is adamant about having a compact, lightweight wallet. I thought this might fit the bill (sorry for the bad pun!). It's constructed of Tyvek, the super light, durable paper that express post envelopes are made out of.
Our first anniversary is around the corner and because the traditional first year gift is paper, I think it's perfect. His name is Ruben, hence the R on the front.
The tutorial for construction I found on instructables.com