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|PhD Cycling Ultra Light Mini features our 4-Degree Fit System and offers skin-tight performance. Merino wool fibers add comfort and regulate your foot's temperature, while WOW™ technology increases durability. This sock is an ideal year-round mountain biking sock. Made in the USA of New Zealand Zque™ Merino wool.|
Smart Wool Sizing Chart
63% Merino Wool, 35% Nylon, 2% Elastic
"Mountain, road, and everywhere in between"
4-Degree Fit System
WOOL on WOOL technology