Naturally, we can attribute that to the superb design of Yank camoflauge patterns coupled to an irregularly scheduled laundry service for the lads, I'm sure.
It's the feet that get me. Standing (slipping!) on shale, walking (up or down-rarely flat) on huge verticals. Their rucks look light, thank God but, still, I'd sure love a foot-bath at the end of the day in some real hot water, I think.
I don't know what they thought of their conditioning when they first arrived but, you can be assured, they're rock-hard now.