Blundstones are made from a natural product: leather. This means you need to take good care of your Blundstones. If you don't, there is a risk that the leather will dry out, crack, or peel away from the sole. Therefore, treat your Blundstones with the appropriate care product. Use the Rustic Cream and the spray for Blundstones made of rustic nubuck, and the Shoe Polish for models made of smooth leather and waxed suede.