Swiftwick sock sizing
Swiftwick prints 1 chart for the models here: unisex. The Swiftwick size chart page shows each one as the maker prints it, with the models that use it.
unisex: Swiftwick sizes by shoe size and prints no between-sizes rule. A new pair can look small before its first wear; Swiftwick says the fitted size is the same.
Look up your size. See the fit checklist for heel position, toe room and cuff clearance.
Wash and dry Swiftwick socks
Machine wash cold, no bleach, no iron. Swiftwick’s product pages say tumble dry low and its FAQ says tumble dry with no heat, so the cooler setting is the safe one.
A different instruction on the exact sock takes precedence over general brand guidance. Use the care lookup and your own drying estimate in the rotation planner.
Guarantee and return checks
Swiftwick’s lifetime performance guarantee replaces socks that wear out, for any reason, however long you have had them; start a claim on its warranty form. It covers the original buyer only, a receipt or order number may be needed, and a pair replaced once is not replaced again.
Returns and exchanges are free, but contact Swiftwick first through its returns form or by phone and ship nothing until asked. Refunds go to the original payment; an older purchase or one without a receipt may be refunded as a gift card.