I'm really pleased to have found Sums. Having gained a couple of heel bisters on a recent ultra I was keen to find a pair of socks that would prevent any more ! So far they have only beeen on a few shortish runs but feel very comfortable . Their true test will be on The Lap -a 74k ultra around Windermere . And as a slow , senior female I'll be on my feet for a long time! I love the values of Sums - the socks were delivered in an envelope that I can use to return worn out socks and thoughtfully a label included. There was no extra unnecessary packaging . And so far I'm very pleased and I look forward to other products .