Smartwool PhD Mountaineering

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Retailers' Descriptions

Here's what other sites are saying:

You have to stay dry, warm, and comfortable while bagging fourteeners, so pull on the SmartWool PhD Mountaineer Sock and make your feet feel good. The 4 Degree Elite Fit system puts bands on the ankle, upper instep, lower instep, and the arch keeps the socks in place and offers greater stretch and recovery, while high impact zones in the toe and heel are beefed-up for longer wear and greater comfort. Meshed vents provide ventilation areas for moisture management.

- Mountain Gear

The SmartWool PhD Mountaineering Socks fit smoothly, comfortably, and easily into your low-volume mountaineering or hiking boots for incredible comfort when you bag peaks and tackle rough terrain. These heavyweight socks feature temperature-regulating merino wool fabric, strategically placed mesh ventilation zones, and a heavy-duty heel and toe.


Smartwool introduces the stronger, more durable, more comfortable PhD Mountaineering Sock. ReliaWool technology for improved durability in the high wear areas and the 4 Degree elite fit system, to keep the sock in place and give you all-sport versatility.


Smartwool PhD Mountaineering Sock FEATURES of the Smartwool PhD Mountaineering Sock 4 Degree elite fit system uses two elastics for greater stretch and recovery to keep the sock in place Patented ReliaWool technology in high impact areas provides 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 Heavy cushion heel and toe for maximum comfort and protection in the highest impact areas of the sock Flat knit foot and leg with heavy duty yarns for maximum comfort and protection in low volume mountaineering boots

- Moosejaw

Featuring warm merino wool and plush cushioning, the SmartWool PhD Mountaineering Socks deliver great insulation while you're bagging your first fourteener or trekking over cold, snowy trails.