The Bona work boot is built with innovation, quality, and complete know-how. The crazy brown full grain saddle leather makes that shank a great part of your daily work life. The support comfort cushion insoles provide great support and perfect pressure distribution for maximum protection. Crazy Brown Trail Leather Rubber Midsole SKU:BA-840 CRAZY BROWN Engineered Composite Shank Removable, Shock-absorbing Comfort Insole Made in North America BONANZA Crazy Brown Full Grain Saddle Leather Work Boot