Keep your stride on point as you take to the streets in this Smartwool(R) running sock. Sold as a three-pair pack. Micro sock is comparable to no-show sock, and sits below the ankle. Lightweight cushioning for optimized comfort without the added bulk. 4 DEGREE(TM) ELITE FIT SYSTEM features bi-elastic fit bands that provide faster flex and recovery at the ankle, instep, and arch. RELIAWOOL(R) technology delivers long lasting wear. Strategically-placed mesh vents for temperature and moisture management. Virtuously seamless toe construction. 51% merino wool, 46% nylon, 3% elastane. Machine wash cold on gentle. Tumble dry low, lay flat, or line dry.