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SmartWool PhD Cycle Ultra Light Mini Socks

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Item # SWL0867

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Item # SWL0867


To some, socks are just, well, socks. But, to anyone that's experienced the absolute horror of poor-performing socks over the course of a century, this couldn't be more of a fallacy. So, whether you're aiming to erase a bad memory, or prevent one from ever occurring, the SmartWool PhD Cycle Ultra Light Mini Socks are your ticket to comfort.

SmartWool's PhD socks are made from a blend of imported Merino wool, nylon, and Lycra. Why the blend? Well, Merino wool is what's called a 'hydrophilic' fiber, meaning that it has the natural ability to positively interact with water. In fact, Merino is capable of absorbing as much as 30 percent of its weight before exuding the sensation of wetness. Additionally, it's naturally antimicrobial, so you'll experience next to no stink from the socks. This property is furthered by Merino's natural ability to disperse electrostatic charges. So, the PhD socks will pick up less dirt, grime, and lint in the first place.

As for the other parts of the equation, the elastane provides the necessary stretch for articulation and movement. Meanwhile, the Lycra provides a light level of support that helps to promote blood flow through the foot. As a result, you'll experience less hot spots and numb toes.

In terms of fit, SmartWool incorporated its Four-Degree Elite Fit System. This system revolves around a seamless toe box and various other, undisclosed, patented technology. So, as SmartWool asserts, these socks are able to withstand a year's worth of centuries without skipping a beat.

The SmartWool PhD Cycle Ultra Light Mini Socks are available in the sizes Medium, Large, and X-Large and in the colors Black, Orange, and Silver.

Tech Specs

[socks] 56% merino wool, 42% nylon, 2% Lycra
3.75 in ankle
Recommended Use:
road cycling
Manufacturer Warranty:

Size chart


Socks (Shoe Size Reference)

Sock Size →
Small Medium Large X-Large
US MEN'S 3 - 5.5 6 - 8.5 9 - 11.5 12 - 14.5
US WOMEN'S 4 - 6.5 7 - 9.5 10 - 12.5 N/A
EU 34 - 37 38 - 41 42 - 45 46 - 49
UK 2 - 4.5 5 - 7.5 8 - 10.5 11 - 13.5

Sock Size →
X-Small Small Medium Large
US 6 - 8.5 9 - 11.5 12 - 2.5 3 - 6
EU 22 - 25 26 - 28 29 - 32 33 - 36
UK 5 - 7.5 8 - 10.5 11 - 13.5 1 - 4.5

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Here's what others have to say...


Great Summer Cycling socks

  • Familiarity:I've used it several times
  • Fit:True to size

It's from smart wool so it has to be great, nice light summer sock, and the smart wool guarantee ! they will replace if any problems.