That's because i posted before a purse i made using this CapriSun envelopes.Only that now instead of being a purse it's a wallet. 
< Down side. 
< As you can see i sew some velcro on the top and in the middle of the envelope, this is for closing and opening the wallet. It's very easy to do, you only gotta know how to sew and if you don't know you just learn . 8) You have to use a sewing machine to do this kind of wallet but... as always you can sew by hand too!
Things you'll need:
*Two CapriSun envelopes
*Sewing machine
*Thread
* Velcro
*A pair of scissors
*Time and dedication :)