Stone Island has drawn back the curtain on the unique process behind the Raso Hand Painted Tortoise Shell. The garment, cut and sewn with a white satin-weave cotton fabric of military origin, is garment dyed black and dried. The signature Stone Island patch is placed on the sleeve, then the jacket is sponged by hand in select areas with a corrosive paste. The bleached parts are then hand painted with tortoiseshell-inspired coloring, and the finished product is then washed, dried and pressed. It's an extraordinary manual process, one that makes each piece one-of-a-kind and well worth a watch. Check out the video below.