"I'm not sure what I like more: the softness of the wool fabric, the venting from the zipper, or the straight-up comfort from the cut." -Gearhead(R) Expert AlexOur Backcountry Cedars RWS Merino Midweight 1/4-Zip Baselayer Top offers thermoregulating comfort, and not just from the techy Responsible Wool Standard-certified merino wool. We integrated this top with a 1/4-length zipper for quick relief on high-output pursuits and extra coverage in cold conditions. Merino wool also resists odors and manages moisture, offering next-to-skin comfort and performance tech on all our winter pursuits.