I've been wearing my Insect Shield socks every day this year and have had two chigger bites and no ticks. These are the factory treated socks that are supposed to last through 70 washings. I have three pairs that I wear and one pair seems to be losing it's strength. I got both chigger bites weeks apart wearing the same pair of socks. Overall, I'm quite happy with the performance of these socks, but I'm going to retire one pair and open a new pair.