Put all the images that can be shown in slots. Eg, in the shoes slot you'll have an image for red shoes, Nikes, Reeboks, etc. At runtime, set the attachment for each slot. In Unity get the skeleton from SkeletonComponent, then skeleton.SetAttachment("slot name", "image name"). Eg, skeleton.SetAttachment("shoes", "Nikes"). You may want to have one "item" as it appears to your players actually be multiple images. Eg, slot "left shoe" would have the "Nikes left" image and "right shoe" would have the "Nikes right" image. Your game will need to know about all the items and what images should be shown in what slots for each one.