Micron + Weight
Micron
Ever wondered why some Merino wool feels like a warm hug while others feel like a prickly cactus by lunchtime? It all comes down to the micron — the measurement of a wool fibre’s diameter. The smaller the number, the finer the fibre, and the softer it feels against your skin.
Not sure where to start? Use this guide to find the perfect softness, feel, and warmth that’s just right for you.
| Micron Category | Diameter (Microns) | Primary Market Use |
|---|---|---|
| Ultrafine Merino | 14.6µm – 16.5µm | High-end luxury apparel and knitwear |
| Superfine Merino | 15.1µm – 18.5µm | Suiting, premium base layers, and fine yarn |
| Fine Merino | 18.6µm – 20.5µm | General apparel, sportswear, and weaving |
| Medium Merino | 20.6µm – 24.5µm | Heavy knitwear, blankets, and carding wool |
| Strong Merino | 24.6µm+ | Furnishings and heavy-duty textiles |
Source: Australian Wool Innovation (AWI) and the Australian Wool Production Forecasting Committee (AWPFC), 2025/26 Season.
Weight
The weight number used for each garment represents the fabric’s weight in grams per square metre. The higher the number, the warmer and heavier the garment.
| Weight Category | GSM Range | Typical Use Case |
|---|---|---|
| Featherweight | 75–120 gsm | Tropical climates, high-intensity summer activities. |
| Ultralight | 140–180 gsm | Standard T-shirts, summer base layers, travel wear. |
| Mid-weight | 190–220 gsm | Fall/Winter base layers, active mid-layers. |
| Heavyweight | 230–340+ gsm | Thick hoodies, thermal leggings, extreme cold protection. |