Smartwool PhD Cycle Ultra Light Men's Mini Sock Black MD

[This review was collected as part of a promotion.] I love these socks! They have a nice, snug fit and do not move at all. They do not stick to your skin, or the inside of the shoe, they are "active". Even on a hot day, they feel cool when I take my shoes off. They are super thin, and are good if you are avoiding bulkiness. They do not itch. The only Issues I had, is when I first put them on, they were a little tight in the arch, but they loosened up. I bought three pair, and one sock had a seam on the toe open up after only a couple of wearings. I sent and email with a photo to customer service, and they sent me a new pair by FedEx right away - great service! One bit of advice: I have US size 11.5/12 feet and ordered XL, but they just fit. If you have feet larger than that, they may fit small.