Toasty and thin
These bottoms are great. Had them out recently and they work very well at 11C under trilaminate without even a base layer on. Nice and toasty. I think these will be good down to 7C ish with maybe a base layer underneath.
It's slightly like wearing a wetsuit, you feel the cold coming in through the trilam at first then it disappears very quickly as you build up the warm air layer.
Not bulky at all so reducing required lead.