I've been buying these socks for a long time so I can honestly tell you I've ridden a lot of miles in them. I used to buy from brick and mortar stores but since Amazon now rules the chain I've given up those stores for everything but disappointment, I have a size 12 men's foot and the size is just right for me. Socks do wear out over time and Dickies always offers 100% satisfaction if you contact them and send them back. I've never returned (so can't comment on the possibility) a pair I've worn and I wore them to the end. Bottom line: they last a long time, at a great price, and Revain gets them to you fast.