I'd actually second the "glove theory" that Stoner posed. I once did an enduro ride in the hills around Mudgee NSW and since it was nearly snowing I decided to wear lambswool lined ski gloves .......... big mistake. About 20km in I could not possibly hang on any more even opening farm gates became a chore ( with the latch chain. ) I ended up taking the gloves off entirely and rode. They kinda came back but they were then pretty numb from the cold ......... Moral of the story, I never wear gloves with anything more than a few layers of leather only on the palm, as it increases the diameter of the grips and really tires the muscles.
It was still a fun day anyway.
Quick jump off topic
Baz, you hear about Ben Grabham at Condo -- hit a roo at 150+, airlifted out.