Smartwool PhD Ultra Light Pattern Low Cut cf-size-d-mens-6-6-womens-7-8 The FS6® Performance Foot Sleeve

The FS6® Performance Foot Sleeve is incredibly effective at relieving the pain of Plantar Fasciitis

easy fill opening and the quick-release hoses

Conforms to left and right structure of the foot providing enhanced fit and reduced risk of blisters

3 Anti-vibration features to minimize stress on joints

Nike's highest-quality fabrics—a feature of our Luxe tights and leggings—combine with a Lightweight

Smartwool PhD Ultra Light Pattern Low Cut cf-size-d-mens-6-6-womens-7-8 The FS6® Performance Foot SleeveWith ultra light cushioning and a low cut build, our PhD Run Ultra Light Pattern Low Cut socks are designed to pair well with your precise fitting running shoes. We made these Merino wool socks with our best technologies to bring you durability, breathability, comfort, and a great fitso you can run for miles and miles.