Smartwool phd mountaineering sock+smartwool extra heavy weight?

I’m curious has anyone tried the smartwool Phd mountaineering socks as a liner with the regular smartwool extra heavy weight mountaineering socks?

I’m curious what the goal would be for this. I have both socks, but since getting the PhDs haven’t gone back to using the thick ones.

(I’m not at all saying that what you are doing is wrong in a passive aggressive way, I’m legit curious) 

I can't imagine wearing the big mountaineering socks in climbing boots. Maybe you have incredibly low volume feet, but they just squeeze my average size feet and end up making them colder. You want room to wiggle your toes.

Smartwool makes a thin liner if you want to use one.

I was thinking of using the phd mountaineering sock in place of a normal wool liner. I believe the phd would act as a liner absorbing sweat but with the added benefit of the calf compression for reducing calf fatigue. I also think it will make stiff full ridge boots more comfortable with the extra padding in the heel and ball if both the extra heavy and phd mountaineering sock isn’t taking up much room inside your boot still allowing your toes to wiggle and feet swell.

Maybe your boots are too big?

Try ski socks. They're tall and tight and come in different thicknesses so you can wear just one sock per foot.

What's the rationale behind folks wearing two pairs of socks anyway? Is it for warmth, correcting poor fit or just the sweat thing?

I would think that the inner sock would simply wet out the outer sock given that the inner isn't waterproof, leaving you with two sweaty pairs. I've never tried it though.

Sounds like your boots may be too big by a 0.5 size. I use the PhD Mountaineering socks on their own and they work great. The thicker socks have a tendency to get compressed or bunch up in weird ways during long days or multidays. 

My boots fit fine. I wear extra heavy socks with my singles and doubles and use the phd for running/hiking. I’ve never had any issues with my boots or socks. I’m just trying to see if anyone else tried this combo. I wear liners with my socks for sweat control and extra warmth. 

Ciao, I am Smartwool sales rep in Italy since 7 years. I also am  designer of climbing shoes. This is not what I recommend to use two socks with that insulation.
Why?
All lasts of all boots have size development that for a given lenght, the increase width in a non proportional way. Adding socks, you change this ratio, compressiong even more the foot and make it colder or making it moving inside the boot even more. In case you need insulation, add a Ski Ultralight below a Ski Medium. For fitting purposes, I suggest Hiking Ultra Light crew.
Ciao,
E