UK sizing With more than 300 years of experience on hiking boots, Meindl is a quality choice for avid outdoorspeople. In the shoe stiffness rating system the Bergell comes in as a B, making it supportive enough for carrying a heavy backpack, while also retaining day trip comfort. Slightly more snug fit than usual. This, combined with the somewhat rigid and rugged structure, leads us to recommend choosing half a size larger than usual. - Gore-Tex membrane: fully waterproof - Surface material: high quality leather - MFS or Memory Foam System: memory foam in the structure enables a perfect fit - Digafix structure binds the boots snugly to your feet - Air-Active insoles are easy to air after a long day - Meindl MultiGriff by Vibram outer soles