When you're forcing your feet over miles of country, the least you could do is ease their plight by putting them in a pair of Smartwool Women's PhD Run Graduated Compression Ultra Light Socks. Their 4 Degree elite fit system places two elastics in the sock to keep them in place while you run. For extra cushion, Reliawool technology occupies high impact zones to help absorb impact. Mesh ventilation zones promote breathability as does wool's natural ability to regulate temperature, wick moisture, and prevent odor causing microbial growth. With a compression rating of 20 30 mmHg, these socks will help maximize blood circulation in the foot and ankle and will limit muscle vibration, helping to reduce your recovery time after a run.