Merino Active panties are made of high quality Merino wool from New Zealand.merino thermal underwear is very comfortable on the body, thanks to its fine and long fibers it naturally absorbs and wicks away moisture , warms even when wet. Merino thermal underwear is odour resistant even when worn for extended periods. Merino thermal underwear has excellent thermoregulatory properties. SENSOR MERINO WOOL from Sensor Activewear on Vimeo.