I used lightweight silk as a base, then this, because silk has a better feel but transmits moisture well. I also had a smartwool mid base layer as an alternate. Both performed well - wicked the moisture out and comfortable whether as a top layer in mild conditions or under an insulating layer and/or windbreaker. No stink after multi-day use, and washed and dried fine. If used as outer layer, I did notice some pilling around the armpits because of the pack straps (Osprey Aether 85, which has pretty rough material). I'd say this is a good, and cheaper, alternative to wool. The neck was loose, but that was good for me, as it vented heat/moisture.