Pandebus got a reaction from Jeff in Minimalist Wallet - What Materials Will Resist Stretching?
You could try using leather. Also it would be great to have a hole in the middle, so you can touch the cards through the hole, and that way slide them out.
Pandebus got a reaction from mart2010uk in Toolbox By Designers For Designers
that's pretty cool. You do certainly need to do something about those stripes, kind of defeats the purpose of having a portable drawing board if it isn't even straight. Also you might want to refine the storage inside, at the moment I would just fill it up with coffee...