Vionic | Shoes | Classic Vionic Spruce Sullivan Black 。VIONIC SPRUCE SULLIVAN BROWN SLIP ON SHOES Worn one time- in great shape- some blemishes-please see photos. Box included. Uppers: Leather • Footbed: Removable Leather • Outsole: Rubber • Our innovative podiatrist-designed Technology provides superior orthotic support, relief and stability which helps realign the feet back to their natural position. • Research supports Vionic\'s Technology success in reducing over-pronation, which can help relieve associated common aches and pains, such as heel pain (plantar fasciitis), knee pain and lower back pain.