Slip in-and-out of Roxan with casual ease. Crafted with a perforated toe box, and nubuck material that's both soft and sturdy. Upper: Nubuck Footbed: Co-Molded Proprietary EVA with memory foam compound. Outsole: Rubber. Lacing system for adjustability. Research supports Orthaheel Technology's 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.