Merino wool's soft, fine fibers wick away moisture. Over time the interior wool takes the shape of the foot. The wool stays soft and comfortable, maintaining its density for a superior fit. A snug cut provides a superior fit as the sheepskin naturally stretches and adapts to your feet. Genuine sheeps wool increases circulation and keeps the feet at a comfortable temperature in cool or warm weather because of its breathability. Cow suede reinforced heel counter preserves heel to better survive daily wear and tear. Fine overlock stitching produces a strong and attractive joint. Both side seams are sewn botton to top for consistent look and longer wear. Removable insoles can be washed or replaced to keep your inner shoe like new.