These are my first pair of running socks and I'm very impressed. Since the pandemic began I've been running a lot more often. A few months ago I started getting blisters on the balls of my feet. I tried making adjustments to my shoes and feet with other products but nothing helped.Since buying these socks I've noticed an improvement. The padding (especially in the ball of the foot area) is excellent and has really helped with the blisters. Also the socks do a great job of preventing your feet from moving around in your shoe when running. I've been able to loosen my shoelaces slightly which has helped alleviate the blisters as well.In addition to helping my blisters I also enjoy how well the moisture wicking technology performs. I tend to sweat quite a bit and these socks keep my feet and shoes dry.I was a bit hesitant at first to spend this much money on socks, but these are so worth it. You'll know right away the first time you put them on.8.5 shoe US. Medium fit well