These rugged work socks feature the performance fibers used in hiking socks, making them ideal for those who spend a lot of time on their feet. SmartWool jersey-knit, fine merino wool helps maintain a comfortable temperature whether the day is hot, cold or in between. Merino wool from New Zealand's alps is a natural, renewable resource that provides thermo-neutral insulation for varying temperatures and activities. Flatseam construction is soft and non-chafing next to skin. Flat-knit uppers cover and protect feet without adding bulk for better shoe fit. Socks stay in place with a 3 x 1 rib leg for a snug, comfortable fit. *Offer not valid for sale-price items ending in $._3 or $._9.