Smartwool PhD Knit Arm Warmer


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Temperatures can be fickle during changing seasons, but the Smartwool PhD Knit Arm Warmer is the perfect accessory to keep your arms warm on chilly morning runs, high elevation trail runs, mountain biking in damp weather or cycling on blustery days. Made with merino wool, nylon and elastane fabric, these arm warmers feature a non-binding 1x1 rib welt at the wrists and biceps to keep them in place and seamless construction for a warm, non-restrictive and non-chafing fit.


  • Fabric: 62% merino wool, 35% nylon, 3% elastane
  • Seamless construction for warmth with maximum freedom of movement
  • Non-binding 1x1 rib welt at wrist and bicep opening to keep warmers in place
  • Made in USA

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Arctic Blue, Berry, Black, Clearwater, Deep Navy, Graphite, Horizon Blue, Liberty, Orange, Persian Red, Poppy, Purple Dahlia and Spearmint.

Available sizes, while supplies last, include size s/m and size l/xl: s/m, l/xl.

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