I had concerns when I bought these socks as I'd been told not to buy anything new to get me through Trailwalker 2012. Having spent months training for this event I'd tried loads of combinations but often suffered as we covered more and more distances, but I had no need to worry with these socks. On just two pairs I covered the 100k in 28 hours nonstop, managed to raise over £3000 for Oxfam & the Gurkha Welfare trust, & didn't suffer any hot spots a single blister, and unlike so many on the day despite the dreadful weather, my feet remained tinder dry & sweet free thanks to these socks and my explorer boots. If there's a sock you really need to rely on to get you through the toughest conditions you won't go wrong with these.