What is the GSM of Thermo Fleece?
(And why it matters when choosing your winter layers)
If you’re wondering about the GSM (grams per square metre) of our Thermo Fleece ranges, you’re not alone. We receive numerous inquiries about this, so we’ve compiled this blog to provide clarity and assist you in making informed decisions.
Understanding GSM in Thermo Fleece
GSM measures fabric weight and density. In thermal wear, it reflects the fabric’s thickness and warmth. A higher GSM means a warmer, denser fabric.
Thermo Fleece GSM Guide
Our Thermo Fleece collection includes several variations to suit different skin sensitivities, warmth needs, and budgets:
Classic Thermo Fleece
- Fabric: 100% Merino Wool
- GSM: 230
- Feel: Midweight warmth, double-knit interlock construction, side seam free
- Best for: Everyday layering, reliable warmth without bulk
Thermo Fleece Sensitive
- Fabric: 100% Cotton inner layer (skin contact), 100% Merino wool outer
- GSM: ~240
- Feel: Extra-soft against the skin, ideal for those with wool sensitivity
- Best for: Sensitive skin or those new to merino wool
Thermo Fleece – Rich Merino Blend (Budget-Friendly)
- Fabric: High Merino content blended with performance fibres
- GSM: 230
- Feel: Midweight, Soft handle, side seam free
- Best for: Great everyday value, for customers wanting Merino warmth at a more accessible price point
How Does Thermo Fleece Compare to Merino Skins?
While both Thermo Fleece and Merino Skins are made from premium Australian Merino wool and offer similar warmth (approx. 230 GSM), they are designed for different purposes and lifestyles.
Merino Skins
Engineered for sports and active outdoor use, Merino Skins garments feature:
- Flatlock stitching for reduced chafing, improved durability, and comfort during movement
- Higher necklines for extra warmth and coverage
- Fitted, athletic styling that moves with the body
- Proven performance — even worn in Olympic events
These are your go-to base layers for hiking, snow sports, running, or any activity that demands a high-performance, breathable garment.
Thermo Fleece
Tailored for everyday comfort and indoor wear, Thermo Fleece garments offer:
- Traditional stitching and side seam free construction (in most styles) for softness and easy layering
- Lower necklines that sit discreetly under shirts and everyday clothing
- A relaxed, casual fit ideal for home, work, or layering under uniforms
- Options like the Sensitive range (with a cotton inner layer) and Rich Merino Blend (a more budget-friendly version)
Merino Skins are performance-driven, while Thermo Fleece is comfort-focused — both are warm, both are breathable, just tailored to different needs.
Here is a more detailed blog about the differences between Merino Skins and Thermo Fleece.
Summary Table
| Product | GSM | Fabric | Best For |
|---|---|---|---|
| Thermo Fleece Classic | 230 | 100% Merino Wool | Daily warmth |
| Thermo Fleece Sensitive | ~240 | 100%Cotton inner / 100% Merino outer | Sensitive skin |
| Thermo Fleece Merino Blend | ~230 | Rich Merino blend (wool, polyester, cotton) | Budget-conscious buyers |
| Merino Skins | 230 | 100% Merino Wool | Active / outdoor wear |
