The Naot Mikumi is a great everyday lace up boot. This style has a padded tongue for ultimate comfort. The Mikumi has padded technical lining in the front for comfort, warmth & moisture absorption. Naot's removable, anatomic cork & latex footbed is wrapped in pampering suede and molds to the shape of the foot with wear. The Serengeti Collection features a lightweight 1.5" TPR lug sole that is durable & provides excellent grip. This collection uses a hand-sewn strobel construction making it strong and extremely flexible.