Troentorp clogs are the authentic, Swedish clog that have been hand-made in Bastad, Sweden since 1907. The heart of the Troentorp clog is the wooden base, orthopedically carved from alder wood. Alder wood is used because it is light, has good moisture absorbing qualities, and above all, maintains its shape and form. Troentorp clogs are also wet lasted which means they are pre-stretched, mold to your feet and keep their comfort and shape. Another distinction of Troentorp clogs is they are certified slip resistant- ASTM 1677 Mark II Certified.