A breakthrough four-year research program led by North Carolina State University has proven that 100% Merino wool base-layers deliver superior thermoregulation and comfort compared to other fibres. The study confirms that Merino wool not only manages heat and moisture efficiently during physical exertion but also preserves warmth during recovery, preventing the common “after-chill” experienced in outdoor sports.
The concept of dynamic breathability—how garments adapt to changing activity levels—has positioned Merino wool as the ultimate natural performance fibre. Wool’s dual-layer structure provides 96% better moisture buffering than polyester, 45% better than cotton, and 26% better than viscose, keeping the next-to-skin microclimate stable across varied conditions.
Woolmark Managing Director John Roberts emphasized that wool responds in real time to physiological changes: “With wool’s structure designed by nature to enhance wearer performance, it automatically keeps athletes close to their comfort zone, allowing 100% focus on the challenge.”
Human trials showed that while all fibres performed similarly during activity, only wool excelled during both activity and rest phases, making it a game-changer for cycling, climbing, hiking, and golf. Sportswear brands are now exploring design innovations based on this science-backed evidence, proving that the future of performance apparel lies in fibres that work with the body—not against it.