Fibres & Fabrics

Soft raw Merino wool fabric collected from Australian sheep farms with green pastures in the background.

Designed by nature. Refined by us.

Merino wool fabric is nature’s high-performance fibre — lightweight, breathable, renewable, and incredibly soft. We select only superfine Merino wool fabric sourced from trusted farms across Tasmania and other premier Australian wool-growing regions.

Every Mason William garment begins with the finest natural fibres — including Merino wool as fine as 16.5 microns in selected products. This ultra-soft, luxurious grade of wool feels gentle on your skin while providing exceptional warmth, breathability, and natural temperature regulation — keeping you comfortable in both cold and warm conditions.

Our Fabrics Are RWS Certified

We use only RWS-certified Merino wool, ensuring the highest standards from farm to fabric.• Sustainably sourced and non-mulesed• Responsibly farmed with high standards of animal welfare and land management• Fully traceable wool with a transparent supply chain• Machine washable and easy to care for• Naturally insulating, breathable, and odour-resistant• Lightweight and perfect for layering in any season Flock of Merino sheep grazing on a green pasture, the natural source of high-quality Merino wool fabric. From the paddock to your wardrobe, every piece goes through a careful, low-impact process — cleaned, spun, dyed, crafted and tested with intention. The result? Timeless garments that feel better, wear better, and tread lightly on the earth.Whether you’re facing summer heat or winter chill, our fabrics are designed to adapt, move and breathe with you.