I'm with @Tony Storaro here. I use Icebreaker merino wool leggings (3/4 length). The fabric weight varies between ultralight and light to perhaps mid-weight for colder periods in British Columbia. While winter touring I usually use a 200 weight fabric and swap to the super-light weight during spring and summer touring. The choices simplify my life and makes packing easier for me.No midlayer, base-layer only: