Nice pics Simon. Can I suggest a pair of running shoes in place of boots instead of changing the type of sock you wear? I don't know if you wear boots hiking or not. Too many people feel that their footwear needs to survive long after they drop dead. How often do you get blisters walking around in running shoes? I switched several years ago and have been blisterless since. The combination of air flow and light weight have been great. No more sore legs or back. If you are wearing boots for support your pack is too heavy.