Fox River Polypropylene Sock Liners

Fox River Polypropylene Sock Liners

Fox River Polypropylene Sock Liners are worn inside your warm-weather or heavy-wool socks to prevent blisters. By wicking away sweat they keep you warm in cold weather and cool when it's hot. They can even be washed and dried within an hour. About $9 per pair; available at REI and most other major sporting-goods stores.