Understanding the Wool Fibre: The Natural Micro‑Engine of Skin Health
Choosing Fiber—Where to Start? | Spin Off
Keratin Structure
What Is Merino Wool? – Darn Tough UK
1. The Outer Layer — The Cuticle
The cuticle is made of overlapping scales coated with a thin fatty acid layer (the F‑layer).
– This layer repels liquid water while allowing water vapour to pass through. It keeps the surface dry to the touch, which is why wool feels comfortable even when it’s absorbing moisture internally. The fatty acid coating also gives wool its natural odour‑resistant and antibacterial properties.
This surface behaviour is what allows wool to maintain a dry interface against the skin, preventing maceration and friction.
2. The Cortex — The Moisture Buffer Zone
Inside the fibre lies the cortex, composed of spindle‑shaped cells that contain microfibrils and a protein matrix.
– These structures absorb up to 30% of the fibre’s weight in moisture vapour.
– The cortex holds moisture within the fibre rather than on the skin surface.
– As humidity rises, the fibre absorbs vapour; as humidity drops, it releases it, a self‑regulating process that stabilizes the microclimate.
This is the moisture‑skin balance mechanism: wool continuously adjusts to the body’s needs, keeping the skin drier and cooler under pressure.
3. The Cell Membrane Complex — The Transport System
Between the cortical cells is a lipid‑protein membrane that acts like a microscopic highway. It moves moisture between cells and out through the cuticle. his slow, controlled transfer prevents sudden dampness or heat buildup.
– It also helps maintain pH balance and reduces bacterial growth For wound‑care and diabetic patients, this means less sweating, less friction, and a healthier skin environment.
4. The Fibre’s Natural Engineering
Each wool fibre is a composite of keratin proteins arranged in a coiled‑coil structure. This gives elasticity, resilience, and the ability to recover shape after compression. The fibre’s crimp creates millions of tiny air pockets that enhance insulation and breathability. These air pockets also help regulate temperature, warm when cold, cool when warm.
Clinical Relevance for Foot‑Care Nurses
Wool’s internal moisture‑management system is unmatched by synthetics. It absorbs vapour, not liquid, keeping the skin dry.
– It prevents maceration and shear.
– It stabilizes temperature and humidity around fragile skin.
– It supports wound prevention and comfort for diabetic and immobile patients.
This is why medical‑grade wool is not just soft, it’s a biomechanical tool for skin protection.
.Anyes de Laat
Soul Comfort Sheepskin
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