I bought the merino toe socks in crew and quarter length. The crew length were specifically to do the mountain run for Coast to Coast in February 2023 as there are multiple river crossings, and the quarter for using in my hiking boots (having got awful blisters a year ago, with normal socks).
They are the bomb!! on the Coast to Coast, I found them comfortable to wear, and my feet remained warm despite the numerous plunges into ice cold water; between the toe blisters and rubbing is a thing of the past.
Highly recommend these for any avid multisporters and trampers. I also do ironman distance in triathlon and would spend the additional minutes putting these on for the run. It's worth it to end a marathon with healthy feet.