Best for most hikers, most boots
Darn Tough Hiker Micro Crew Cushion Socks
Merino blend, knit dense enough to resist packing out, and replaced free for life if they wear through. The default answer.
The reason these are the default recommendation is not that merino is magic -- most merino blend socks perform similarly on a single hike. It is the knit density and the warranty. Cheaper wool socks pack out: the loft that cushions your foot flattens permanently after a few dozen washes, and a flattened sock is where the blisters come from. These stay lofted considerably longer.
The warranty is the other half. Wear them through and they are replaced, with no receipt and no argument about whether it was a defect. Over ten years of hiking that turns an expensive sock into the cheapest option on this list. Buy the height that matches your footwear, and note that micro crew is designed to clear a low boot cuff -- for tall boots you want the taller version so the cuff rubs sock rather than skin.
Specs
- Merino wool blended with nylon and Lycra
- True seamless toe closure
- Micro crew height -- above a boot cuff
- Unconditional lifetime guarantee
Good for
- The warranty is genuinely unconditional, which changes the cost over a decade
- Dense knit resists the flattening that makes cheaper wool socks useless in a season
- Fine gauge means they fit inside boots without crowding, unlike thick wool socks
Bad at
- Expensive per pair, and you need at least two pairs
- Mid cushion is too warm for hot-weather trail running
- Micro crew height is wrong for tall boots -- size up to the boot-height version
