Non-marking outsole Partially recycled outsole Durable outsole Insulated Warm your soles in style with the ready-to-go Birmingham boots from Jambu™. Natural Motion™ design allows for a more fluid range of motion. Combination tumbled leather and brushed suede upper. Extended toe and heel bumpers for extra protection. Back zipper for easier on/off. Synthetic lining is warm and cozy. Cushioned footbed offers soft underfoot comfort. Double Rice Rubber™ outsole is lightweight and flexible. All Terra Traction™ delivers exception grip. Weight: 10 oz Product measurements were taken using size 8.5. Please note that measurements may vary by size.