Has anyone tried the Integral Designs vapor barrier liners to keep sweat from soaking their outer socks/insoles? Recently, on a trip to the Colchuck area, the inner boots and my orthotics got pretty damp from foot sweat, and a pal of mine with me at the time had Nepal Extremes, with the vapor barrier liners...his feet stayed warm, and my toes ended up getting cold.
Just food for thought; might be something to experiment with.