The Laced Lug Boot in Onyx Black Soft, stretchy water-resistant upper in black made with RWS-certified merino wool. Cushy insoles for added comfort and support. Comfortable, adjustable laces in black for an optimal fit. Lightweight rubber lug sole in black with durable traction. Chunky 1.5-in (4-cm) heel for added height. Pull tab and stretch gore panels make it easy to slip on your boots.