Seems to depend on the shell. For my Garmont MegaRides, she recommended one full mondo up for the liner, for my Zzeus, she said to match the size.

The Garmont G-fit liners that came with my MegaRides were okay for warmth, with my feet a wee bit cold at -15C or so. The Intuition wrap liners I replaced them with are warmer (-15C and my feet are...

I've never had an overlap liner, so I'm not sure how they tour, but I know Lee Lau uses the overlap liner in his MegaRides, and has positive things to say about them for touring, so I might go that...

Last year I heavily used my MegaRides, and the OE liners are packed out quite badly now, and they didn't seem very high quality to begin with.

I am going to purchase some Intuition liners, but I...