Wood sole Comfortable wooden clogs made of natural materials. We know, sizing can be tricky sometimes. That is why we created our very own size guide to help you find your Sandgrens size. Scroll down to Product Description and follow the instructions. If you’re looking for more information about our materials and how to care for them, please scroll down to Product Description and you’ll find all the information you need. We craft all clogs by hand in our factory in Sweden. This color is VEGETABLE TANNED leather – a leather where natural materials such as tree bark and plant extracts are used during the tanning process, making this the purest form of tanned leather. Please note these clogs are not for use in areas where they will come in direct contact with an excessive amount of water, oils, or corrosive chemicals.