Here's what other sites are saying:
Merino Wool keeps you warm and dry while skiing, snowboarding, or building a snowman with the kids.. . . Merino wool is a renewable fiber that keeps you cool during the summer and warm all winter long. When blended with nylon and spandex, the result is a durable, machine washable, and dryer friendly sock that's great for any athletic activity. Spandex offers a "memory" fit custom to your foot. Breathable mesh instep panels. Cushioned sole and shin perfect for long days in ski boots. Machine wash warm, tumble dry low.
- EMS refers to the men's version