Men's Fastpack Micro Crew
"These darn tough socks seem good and strong, and likely to last well. However, they are very tight on the leg above the ankle, constricting the blood flow. Taking them off in the evening, the area of my leg above the sock is swollen right up because the tight sock below has been way too tight on my leg. I tried a size larger, but the sock is still way too tight above the ankle, and I do not have fat legs."
UK