Zappos.com is proud to offer the Kalso Earth - Intricate (Black Rhino Leather) - Footwear: The Intricate boot from Earth® tones, trims and even helps build some lean muscle in the legs! ; Suede and crinkled leather upper with contrast stitching, studded accents and rounded toe for a casual appeal. ; Top goring with full-zip closure offers an adjustable, calf-hugging fit for fashion on-the-go. ; BioFoam™ footbed molds to the shape of the foot, displacing and absorbing shock. ; Slight 3.7º incline positions the toes higher than the heels to strengthen, tone and engage muscles throughout the body. ; Reinforced support through the arch maximizes the effectiveness of the incline to promote a natural walking motion. ; Textured rubber outsole adds lightweight durability and helps reduce step shock. ; Shaft: 14 in ; Circumference: 15 3 4 in ; Weight: 1 lb 5 oz ; Product measurements were taken using size 8.5. Please note that measurements may vary by size.