Sorry I explained my socks/inserts relationship badly. Nowadays I take two pairs of medium weight socks and two pairs of thin socks. Depending how I have arranged my inserts, either both in, one in or the other in depends on which socks I may wear at the time. I try to adjust to suit my feet at the time, how many miles I've done, if its hot or cold, do my feet feel a bit swollen or not, etc? So for example, on days when its hot and perhaps my feet feel swollen I may use my Sorbothanes plus thin socks, or my original inserts and my medium socks? I just try to achieve the best combination to suit how my feet are feeling at the time, how good my legs feel, what type of terrain I'm walking on and so on. I tend to do decide on which combination to use, once in the morning and once in the afternoon. It may seem to be fussy and complicated but its not really, just something I've tried to develop for myself to try to feel good for as long as I can each day. In the early days of my hiking I really didn't like to feel so achey in my feet and legs, by mid afternoon my legs could feel like lead! Some nights were painful as well as I tried to sleep, tossing and turning trying to find my best position and stopping my legs aching into the night. So by trial and error I have tried and am still trying to improve things for myself. Nothing I do can offer perfection but in order to enjoy every mile, especially on a long and tiring stretch, its 'good enough.'