I'm due to be 64 at the end of 2020; I hiked the AT after graduating high school ~1974 and I still hike. So, I've been through some socks. I have tortured more than a few brands to death but the Darn Tough socks..., I just sort of retired them after loooong service. Merino wool is the best material for socks that I've encountered and Darn Tough are the best of the Merino wool socks that I've tried. I stopped buying socks made of anything else many moons ago. Cotton is a common but exceptionally poor choice of material for socks IMHO. Cotton absorbs water so it won't dry out quickly and it isn't antimicrobrial. All of my socks are made of a blend of Merino wool, some Lycra or Spandex.(typically ~ 3-5%) and nylon or polyester (something tough that doesn't absorb water). The Darn Tough standards are incredibly comfortable and I suspect that they'll probably wear like iron, just like my other, relatively tortured, Darn Tough boot socks. I gave up on "working" at 49 but if I were still still doing that then the standards are what I'd be wearing to the office. Now, I wear'em when I'm knocking around town. I haven't been buying from Gobro very long yet but they're my go to provider right now, fast shipping and excellent customer service thus far....