I would eliminate the sweating. I sweat a bit when riding but not bad. Does your helmet have adjustable vents?!? Worth it methinks...
Also what do you wear around your neck/face? If I'm in the trees/powder and working hard I've got to open my jacket a bit to let heat escape. I think it's all about managing your body temp. Wear the right clothes so that on the lift you zip everything up and are just right, open vents on the way down to keep from overheating.
just my $.02 of course...
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