I’ve used a pair of these socks for everything from hiking to mountain biking and they’ve been comfy and light and my feet never got either too hot and sweaty nor too cold, which is about as good as recommendation as you can give any socks I reckon.
They’re made from a combination of organic Merino wool and recycled fibres so are very ‘green’, with a seamless anatomical fit and light cushioning.
This makes them ideal for activities that are less demanding on the feet – so not what you’d use for full-on day hikes but ok for most other summer stuff.