What's the skin spray made of?                                                                                                                                                                                                                                                                                                           Healthpoint's spray, currently sporting the decidedly un-mellifluous name HP802-247, is made of donated skin cells (keratinocytes) and an anti-clotting agent (fibroblasts). The two substances are believed to work together to speed up healing and stimulate the body's production of new skin to cover the wound. The standard treatment for leg ulcers is a compression bandage, which heals up to 75 percent of the lesions within six months.