Hiking socks geared up for all-conditions adventures. X Ultra is the Swiss army knife of hiking socks: ultra-reliable and adaptable to any hiking conditions. Comfortable, warm, and dry, they'll stay put throughout the day with just the right level of snug hold. In homage to the shoes they're named after, they're ideal for long hikes and any outdoors adventure you embark on. Developed with a Merino wool blend and backed up by ventilated panels for temperature stability and additional comfort. Fully elasticated all over to offer muscle support for fatigue relief over long distances. Increased support in the arch area thanks to a specific nylon knit that results in a stronger elasticated hold and fitted sensation.