I've bought many different types of thermals from many high end brands and this is by far the best. The price is justified with the quality and warmth it provides. I ordered the heavy weight 450, large bottoms and top (I'm 6.1 and 235) they fit snug but just right, the length in the top and bottom were great. Material was soft. I spent a ton of time on my quad in -15 to -20 and I wore over my thermals: a insulated sitka hunting coat and a thin tshirt under the woolx top, a thin pair of water proof pants and the woolx baselayer pants underneath and I stayed warm. I hiked and was surprised that my body temp stayed the same, I didn't over heat with the woolx, it kept my body temp consistent.