UK sizing. The Meindl Vakuum Lady boots are comfortable right out of the box! This stout and comfortable trekking boot will get you through even the harshest, most demanding terrain. These boots come in a small variety of shades of brown, reaching from the relatively light seen in the product image to a somewhat darker one. - Womens last - Memory Foam System Vakuum structure: the shoes have memory foam (shown in yellow in the additional image) which offers a snug fit without causing pressure - Form-fitting Air Active Vakuum footbed - Nubuck outer - Gore-Tex laminate - Protective scree collar - Digafix lacing - Class B rated: good ankle support and a relatively stiff midsole structure