At Birkenstock, tradition and heritage are important hallmarks of a brand that dates back not years or even decades, but centuries. Since 1774, Birkenstock has passed this commitment to quality down from one generation to the next. Birkenstock Natural Skin Care hones the restorative and moisturizing properties of cork oak extract to deliver a line of products that helps your skin reach its full potential. For Birkenstock Natural Skin Care, the focus is on certified natural cosmetics. All of the products are certified to the Cosmos Natural standard and are therefore subject to the strictest test criteria.