The Women's PhD® Run Ultra Light Micro socks are designed to keep your feet cool, dry, and happy all day long. Featuring Smartwool's Indestructawool™ technology, this sock is built to last. The Achilles tab helps prevent your socks from slipping into your shoes while the body-mapped mesh zones offer premium breathability. Smartwool also included their Shred Shield™ technology to prevent wear from your toes. This race-ready sock is designed with a women's specific shape with a narrower heel and slimmer fit. Go farther, more comfortably in the Smartwool Women's PhD Run Ultra Light Micro.