Am I going to take up shoemaking? Made from a single piece of biodegradable wool felt, “Lasso” by Gaspard Tiné-Berés are warm, comfortable slippers that are stitched together with standard colored laces.
I tried this out to make guest slippers. It took a bit of work through trial and error. The real problem is that thick felt like that is really expensive and the thinner stuff doesn't hold a shape as well