I have pain associated with varicose veins in my legs so I wear these socks all day every day for everything. At my desk, walking, running, squash, tennis, skiing, on holiday even in hot temps.They are really comfortable and last well even with machine washing at 40°C. I wish for a wider variety of colours though as it would be good to be able to keep pairs together. They are really important to my life! No blisters, no pain. They are great!