Mountain Horse Sovereign High Rider Riding Boots in Dark Brown. The Mountain Horse Sovereign High Rider Riding Boots are stylish tall boots made from hard wearing, premium selected leather that gives a beautiful shine making them perfect for competition wear. The Sovereign High Rider Boots feature ShockXâ ¢ technology in the footbed which boosts an ergonomically designed cushion footbed with a builtin 850 º steel shank for improved stability while riding and walking and the High Densityâ ¢ outsole provides excellent grip and durability with ripple zones for increased performance. The Sovereign High Rider Boots also feature the unique MH Prolaze Stretch-Flexnotchâ ¢ which makes it far easier for your foot to sit in the correct heels down position. The Sovereign Boots offer a durable YKK zip down the back of the boot, hidden elastic down the inside shaft for a more custom fit, an elegant Spanish top and Mountain Horse branding to the side.