The Injinji Performance Lightweight No-Show socks are my favorite. The sock comes right above your shoe and will not slip down. they are so soft and comfortable you will not want to take them off. They keep your toes dry and help prevent annoying and painful toe blisters. they hold up to machine washing and drying but the soft, lightweight material is not too fond of toenails. But, as a runner you should always make sure your feet and toenails are in good condition and thus, your Injinji's will last longer. If you need another pair, you cannot beat the price!