+1,0000

Start with Icebreaker and Ibex (icebreaker.com and ibexwear.com, respectively).

Unfortunately for guys, it's much easier to find inexpensive lightweight wool for women than for men (I wear wool shells that I pick up in thrift stores), but if you're willing to spend a little, merino wool garments are well worth it if you're trying to manage sweat more effectively.