Yes, they are expensive and, yes they are worth the expense if the goal is to keep you feet warm. I have some peripheral blood flow issues, meaning that I am more likely than most to get frostbites on my feet even when it's not too cold but these socks took care of the problem and my feet were happy and warm all winter long.

Getting into specifics, they are made of:

- 65% Merino wool
- 31% Nylon
- 04% LYCRA spandex

They are also Made in the USA. In Vermont, to be more specific.

The makers claim that the Merino wool is highly breathable, itch-free, fast drying and... naturally anti-microbial. I don't know what that last claim means but I can confirm that these socks, indeed, are are a very comfortable wear, they do keep my feet dry and warm and they don't look too bad either. I can't verify the claim that these socks will be keeping you cool in the summer because I haven't had them last summer.

The makers of Darn Tough promise an 'unconditional lifetime guarantee' stating that "if our socks aren't the most comfortable and durable socks you've ever owned, return them for your money back". I'm not sure how that works but I'm not planning to return them because I really like them on my feet.

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>> Brush your teeth, it's the law! <<