Wearing a wool sock underneath can be great for warmth and comfort - or they can be worn by themselves. They have a sticky pattern on the bottom of the sock - if this proves to be a problem, turn them inside out. While a bit on the thin side, these socks have high quality neoprene which makes them stretchier and easier to get on.

For more infomation about Neo socks check this thread at Canyon Collective.

Weight: 3.6 oz (100 gm) per pair, size M

Color: Black

Many canyoneers, perhaps most, at least here in Utah, wear their neoprene socks over a wool heavy hiker, and it is important that the neo socks be large enough that there is room for your toes to expand as you hike.  Then again, people use them for various activities and have wide ranging taste in how they like them to fit.

Neoprene socks are designed for use by surfers and scuba practitioners where very little hiking is involved. They sculpt the socks to fit tightly around the toes.  The sizing on the socks is crafted for this use and this fit.  I recommend a more-generous fit for canyoneering, both for toe space, and to accommodate a wool sock as is often worn underneath the neo sock.

Personally, my feet are a 10.5 and I wear the XL sock.  Your taste in fit may be different.

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