This is a smartwool base layer used for skiing in the coldest of conditions. It is the heavy one smartwool makes. 100% Merino wool. These were only used one season and are in excellent condition. There is a little pilling, so I took an up close shot. It is mostly on the seams. I am throwing a pair of socks in as a gift for the complete set. The socks are in good used condition—no holes and elastic is good, but more pilling as you can see in the photo. These are all freshly laundered. Please ask if you havee any questions.