I recently bought a Lusekofte cardigan from a thrift store, but it happens to be two sizes too big for me. It's XL I could maybe work with a large, but I would prefer a medium. I want to shrink it, but it's 100% virgin wool and already pretty thick, so I'm worried that it will felt so much that it'll become as stiff as cardboard. Any advice on how I could solve this issue? Preferably for cheap.