The Esteem Dressage Saddle is a calf-covered leather saddle with a deep seat and adjustable knee blocks. A leather wear patch on the flap provides increased durability. As your horse’s level of fitness and shape changes, the simple & quick changeable gullet allows you to alter the width of your saddle to custom fit your horse. 10-year warranty on the tree. 2-year warranty on the saddle. This model is compatible with the Opti-Fit Series III gullets. *Please be aware saddles featuring a colored gullet inside are compatible with the Series III Gullets.