Designed to Perform.

The Sustain line from Swiftwick is a sock collection made with REPREVE fiber. From the “second skin” fit to the supple finish, you'll feel the difference the moment you put them on, including the right amount of cushion in the areas of your foot that need it the most.

Need another good reason to buy Swiftwick?

REPREVE helps make Swiftwick socks better for the environment. Plus, a tightly-knit construction produces a softer, denser, more durable garment. So good, in fact, Swiftwick says they're “the best socks you will ever wear... guaranteed.” Wear Swiftwick and buy fewer socks.