Arcteryx has done it; they have created the ideal baselayer for any activity when they designed the Arcteryx Rho LTW Zip for Women.
Constructed with soft, itchless, stretch knit merino wool, the Rho LTW insulates even when completely saturated, regulates temperature far better than a synthetic baselayer, and resists odor, even on a week long backcountry trip.
A collar zip makes for easy layering and great ventilation and the form fitting silhouette and nolift gusseted underarms give you the freedom to move without restriction.
light weight and warm
The description tells it all, itchless wool that keeps you warm without weight. It is soft and stretchy- it has a close fit but very comfy. My "go-to" base layer.
Great product but order up a size
This is a great baselayer but fit a little tighter than I was expecting. It's 95% wool/5% Lycra. I plan to return my medium for a large.