Merino Wool Thermals & Base Layers

Merino wool thermals keep you warmer than synthetic base layers at the same weight, breathe naturally, and stay odour-free for days — which is why they're the go-to winter layer across Australia's cold regions. At Darrahopens you'll find men's and women's merino wool blend thermal tops, leggings, long johns, and heavy-duty merino socks from as little as $17, with Australia-wide shipping. Sizes range from 10–20 (women) and S–3XL (men).

How to choose merino thermals

• Tops & long sleeve base layers — wear next to skin under work gear or winter clothing; merino regulates temperature so you stay warm without overheating.
• Leggings & long johns — full-length warmth for outdoor work, camping, and winter sports.
• Merino socks — double-cushion heavy-duty pairs popular with tradies; 90% wool.

Frequently asked questions

Are merino thermals warmer than polyester thermals?
Weight for weight, yes — merino fibre traps more air and keeps insulating even when damp, unlike most synthetics.

Can you wear merino thermals all day?
Yes. Merino is naturally odour-resistant and breathable, so it stays comfortable for all-day wear indoors and out.

How do I wash merino wool thermals?
Cold gentle machine wash or hand wash, dry flat in shade. Avoid tumble drying, which can shrink wool.

Do you ship Australia-wide?
Yes — all thermals ship Australia-wide from Darrahopens.