New Balance Men's MW577 Walking Shoe Synthetic Fit: This style tends to run small. For an accurate fit we recommend purchasing a full size larger. For example, if you normally purchase a size 7, we recommend purchasing a size 8. Insole: Polyurethane Outsole: Rubber Upper: Leather Features of this item include: ABZORB, APMA, Arthritis, Black Friday - Cyber Monday, Diabetic Feet, Foot Care & Wellness, Holiday 2016, Medicare Approved, PDAC, SADMERC