DZR Mechanic Urban Shoes NATURAL GUM RUBBER: Natural rubber is sticky, durable and provides optimum grip on a variety of surfaces. VARIABLE FLEX SHANK: DZR's feature technology A full-length nylon mid-sole/shank designed with strategically mapped stiffness for a combination of power transfer while pedaling and flexibility for walking. VEGAN: Keeping animals happy, one shoe at a time Size Range: 37-47 Sex: Unisex