The SmartWool PhD Racer Ski Sock proves you don't need wires and silicone to be hi-tech. You just need smarts, like the new and improved 4 Degree Elite Fit System which makes these socks even more comfortable than before. Patent pending Reliawool technology that is more durable, improves wear and makes a thousand miles underfoot nothing but a thousand miles of fresh air, good memories and great views.

• New 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place
• Patent pending ReliaWool Technology in high impact areas provides the longer lasting protection to keep feet comfortable
• Strategically placed mesh ventilation zones provide ventilation for temperature and moisture management
• Low Profile and durable virtually seamless toe
• Multi-density cushion in the shin places the maximum amount of protection where shins contact boots
• Light cushion heel keeps the heel in place and guards against abrasion. Contour cushionin the ankle protects ankle bone without adding bulk.
• 14" overall height
• 58% Merino Wool, 39% Nylon, 3% Elastane