This is a crutch wallet, the idea being that when your in crutches you lack the ability to freely move your hands as you have to support the crutch. The crutch wallet rests on the crutch slightly above the handle and has the ability to hold, a true wallet or coin purse in the large pocket, slots to hold diffrent types of cards, and a place to put small miscellaneous items. The crutch wallet has the ability to remain on the crutch useing the bolt that also supports the handle its wingnut, and the guiderails on the back of the crutch wallet. 

The pictured version is the original design, and is only 1/3 the size. The submitted verion has an additional card holder thats flush with the small pocket, and has material cut off the long support. This version wasn't printed due to time constraints, but should make the design easier to print, and use less material.