SCARPA claims that this is a favorite at their Colorado office - comfortable like a light hiker, but supportive and precise like an alpine boot, the R-Evolution GTX performs well enough for speed/fitness hiking, but has no problem doing a car-to-car ascent of Longs Peak. SCARPA's Sock-Fit DV uses a stretch Schoeller™ material that provides a snug fit (memory foam, too!), but breathes well. The speed lace hardware and 1.8mm suede upper tighten progressively, delivering unparalleled comfort. Men's and women's versions, for blissful fit and function.