Lightweight and according to swiss engineers at x socks particularly good for middle and long distance runs the updated x socks run speed two running socks combine impact absorbing and blister defying cushioning zones at the ankle toe toe tip instep achilles tendon and heel with airconditioning and airflow ventilation channels plus skin nodor antibacterial fabric to keep you going the distance with more protected fresher and drier feetand because womenrsquos feet have a differen