Certified RWS merino wool has become the benchmark for technical outdoor apparel thanks to its natural regulation of heat, moisture, and odors, while remaining soft against the skin. Unlike synthetic fibers, merino acts as a thermal regulator: it insulates when cold, breathes when warm, and performs even when damp. That’s why AYAQ exclusively uses RWS merino in its base layers, sourced from Italian farms where sheep are raised outdoors. For intense efforts or mild temperatures, the MEFONNA (men’s / women’s) (100% lightweight merino) quickly wicks moisture and stabilizes body temperature. The BIAFO (men’s / women’s), also 100% merino but more versatile, is ideal for four-season outings, ski touring, hiking, and running in cool conditions. The SHIRWALI (men’s / women’s), 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 to insulate 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 thermal regulation after long hours of exertion. Comfortable, durable, breathable, and naturally technical, AYAQ merino forms the ideal foundation of the 3-layer system for all outdoor activities.
