Why Choose Merino for Outdoor Activities: Thermoregulation, Comfort, and Sustainable Performance

Certified RWS merino wool is the benchmark for technical outdoor apparel, naturally managing heat, moisture, and odors while remaining soft against the skin. Unlike synthetic fibers, merino acts as a thermal regulator: insulating when cold, breathable when warm, and effective even when damp. That’s why AYAQ uses only RWS merino in its base layers, sourced from Italian farms where sheep graze outdoors. For intense efforts or mild temperatures, the MEFONNA (100% lightweight merino) quickly wicks moisture and stabilizes body temperature. The BIAFO, also 100% merino but more versatile, is ideal for four-season outings, ski touring, hiking, and running in cool conditions. The SHIRWALI, a merino-Tencel blend around 240 g/m², provides extra warmth for early starts, high altitudes, or winter sports. Merino also prevents sudden cooling during breaks, as it continues insulating even when wet—a major advantage in the mountains. According to Vincent Defrasne, “the base layer determines all-day comfort.” Tested by Mike Horn in cold, damp, and freezing conditions, AYAQ merino shirts maintain their structure and regulating ability after long hours of activity. Comfortable, durable, breathable, and naturally technical, AYAQ merino forms the ideal foundation of the three-layer system for all outdoor pursuits.