Mammut's Redburn GTX shoe is a highly technical, waterproof approach shoe. The Redburn is a versatile, fully featured shoe equipped to handle the toughest approaches to backcountry crags. You don't need to be climbing to appreciate their features, however; they tend to be stiffer than typical light hiking shoes, which lends itself to better scrambling ability and less leg fatigue in steep terrain. They also have softer, stickier rubber in the toe area for better grip when scrambling. The Redburn in particular has a snug fit and a unique, non-gusseted tongue design designed to make the fit more sock-like.