New 4-Degree Fit System For All Day Performance Fit, 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 14" overall height 1x1 ribbed welt, 1x1 ribbed leg...more info

New 4-Degree Fit System For All Day Performance Fit, uses two elastics for greater stretch and recovery to keep the sock in place Patent pending Relia Wool 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 Flat knit durable toe seam for high burst strength 13" overall height...more info

New 4-Degree Fit System For All Day Performance Fit, uses two elastics for greater stretch and recovery to keep the sock in place Strategically placed mesh ventilation zones provide ventilation for temperature and moisture management Flat knit durable toe seem for high burst strength 1x1 ribbed welt, 1x1 ribbed leg 14" overall height...more info

New 4-Degree Fit System For All Day Performance Fit, uses two elastics for greater stretch and recovery to keep the sock in place Patent pending Relia Wool 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 Flat knit durable toe seam for high burst strength 1x1 ribbed welt, 1x1 ribbed leg 14" overall height...more info

New 4-Degree Fit System For All Day Performance Fit, uses two elastics for greater stretch and recovery to keep the sock in place Patent pending Relia Wool 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 14" overall height 1x1 ribbed welt, 1x1 ribbed leg...more info

4-Degree Fit System For All Day Performance Fit Wow Technology In High Density Impact Zones To Reduce Shock & Abrasion Smartwool Inside For Moisture Temperature And Odor Control Strategic Mesh Zoness For Maximum Ventilation Patent pending Relia Wool 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-...more info

New 4-Degree Fit System For All Day Performance Fit, uses two elastics for greater stretch and recovery to keep the sock in place Patent pending Relia Wool 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 Flat knit durable toe seam for high burst strength 1x1 ribbed welt, 1x1 ribbed leg 14" overall height...more info

New 4-Degree Fit System For All Day Performance Fit, uses two elastics for greater stretch and recovery to keep the sock in place Patent pending Relia Wool 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 Flat knit durable toe seam for high burst strength 1x1 ribbed welt, 1x1 ribbed leg 14" overall height...more info

New 4-Degree Fit System For All Day Performance Fit, uses two elastics for greater stretch and recovery to keep the sock in place Patent pending Relia Wool 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 Flat knit durable toe seam for high burst strength 1x1 ribbed welt, 1x1 ribbed leg 14" overall height...more info

Smartwool has made the most technical wool socks yet with graduated compression. You get improved blood flow, better support a shorter recovery time. This light half-cushioned sock protects against shock and abrasion. New 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place Strategically placed mesh ventilation zones provide ventilation for temperature and moisture management Low profile and durable virtually seamless toe 20-30 mmHg graduated com...more info

New 4-Degree Fit System For All Day Performance Fit, uses two elastics for greater stretch and recovery to keep the sock in place Patent pending Relia Wool 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 Flat knit durable toe seam for high burst strength 1x1 ribbed welt, 1x1 ribbed leg 13" overall height...more info

New 4-Degree Fit System For All Day Performance Fit, uses two elastics for greater stretch and recovery to keep the sock in place Patent pending Relia Wool 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 Flat knit durable toe seam for high burst strength 1x1 ribbed welt, 1x1 ribbed leg 13" overall height...more info

The PhD Ski Ultra Light was designed after our classic Ski Ultra Light, except with a 4-Degree Elite Fit System and Reliawool Technology to create our most comfortable and durable sock yet. 4 Degree Elite Fit System offers great stretch and recovery for a better fit Patented Reliawool Technology in high wear areas for maximum durability Mesh ventilation offers increased breathabiltiy Low profile and virtually seamless toe...more info