New and improved with a 4 degree Elite Fit System and ReliaWool high-density impact zones, SmartWool PhD Outdoor Heavy Crew Socks deliver more comfort with an improved fit and greater durability.

• 4 Degree Elite Fit System improves fit and comfort—four elastic bands gently wrap and support the foot and allow for greater stretch and recovery while the foot flexes
• Four elastic bands: ankle band, upper and lower instep bands, and arch band keep the sock in place
• ReliaWool high-density impact zones provides longer lasting protection to keep feet comfortable
• Strategically placed mesh ventilation zones provide ventilation for temperature and moisture management
• Soft merino wool regulates temperature to keep feet warm when it’s cold and cool when it’s warm, manages moisture for breathability, naturally resists odor, and does not shrink or itch
• Heavy full cushion for maximum impact absorption and insulation
• Flat-knit durable toe seam for high burst strength
• 1x1 ribbed welt
• Overall height: 8.5 in.
• Machine wash and dry (inside out)