Icebreaker Women's Hike+ Light Crew Sock - Black Size:Medium The primary power option is Prevent short circuit

Icebreaker Women's Hike+ Light Crew Sock Black Size:Medium The primary power option is Prevent short circuit The primary power option is a single 18650 (3400mAh) battery Like a good day on the mountain FeaturesA Anatomical toe box for unique left and right fitB Sculptured cushion maximizes fit and comfortC Achilles support keeps your sock in placeD Reinforced heel and toe for durability and strengthE Ankle support enhances fitF Instep support for stabilityG Seamless toe closure to reduce bulk and prevent blistersH Breathe zone for improved ventilationI Function junction to eliminate bulkJ Comfort cuff wide welt for comfortLight Cushioning Tumble dry on low