Soft and sleek, our equestrian-inspired boot is crafted from luxurious WATER-REPELLENT leather and finished with a side zipper for easy on/off. Regular or wide calf widths. Designed with exclusive alignment technology to balance the whole you. Vionic Shoes exist to harness science to make every day better. At Vionic, we're disrupting the footwear space by transforming how people view shoes - from walking shoes to slippers and everything in between. It's not very often we come across a brand that helps to bring balance to our lives. Many of our products are recommended by the APMA, or American Podiatric Medical Association, providing STABILITY, FLEXIBILITY, CUSHIONING, and ARCH SUPPORT in every pair. Vionic was created by scientists who have proven the notion that balance begins with our feet and moves throughout our body. Our VIO MOTION technology is the fusion between dynamic movement and grounded stability solving whole body balance. Our shoes HELP reduce common foot pains associated with OVER PRONATION, and PLANTAR FASCIITIS. Our shoes will help you walk through your day without sacrificing style. FIND YOUR PERFECT FIT IN MEDIUM & WIDE CALF BOOTS Along the outside of your leg, measure 12 inches from the bo¬om of the foot up the side of the leg with a ruler or flat measuring tape. At the 12 inch point on the leg, take a flat measuring tape and wrap snugly around the calf. Note this measurement in inches. This is your calf width measurement. Compare your calf width measurement with the Vionic Calf Width measurement guide. If your calf width measurement is within a ½ inch of the widest measurement for Medium calf, we recommend going up to a Wide calf boot. If you prefer to wear thicker tall socks with your Vionic boots, we recommend measuring your calf width while wearing the socks for a more accurate fit. MEDIUM CALF 12.9-14.1 INCHES WIDE CALF 14.6-16.1 INCHES.