Premium Merino Thermals UK
Australian-made Base Layers
100% Australian Merino Wool Thermal Underwear – Perfect for British Weather – Fast UK Delivery






Merino Thermals and Merino Base Layers direct to our UK customers
For over 40 years, we’ve been manufacturing the world’s finest merino wool base layers and thermal underwear in our Melbourne, Australia, factory. Now serving UK customers directly, we bring you authentic Australian-made merino thermals designed to handle the British climate with ease.
Whether you’re working outdoors in the cold and damp, hiking the Lake District, cycling Scottish trails, or simply looking for superior thermal underwear for everyday comfort during British winters, our 100% merino wool clothing provides unmatched warmth without bulk.
Why Australian Merino for UK Weather
Perfectly Suited to British Conditions
Handles Damp & Cold: Unlike synthetic base layers, 100% merino wool wicks moisture away from your skin while retaining warmth – even when damp. Perfect for the UK’s wet, cold climate.
All-Day Comfort: Our double-knitted merino base layers regulate your temperature whether you’re outdoors in freezing conditions or indoors with central heating.
No Odour Build-Up: Merino wool naturally resists odours, so you can wear your thermals multiple days without washing – ideal for multi-day hikes or work wear.
Fully Machine Washable: Unlike hand-wash-only merino brands, our unique double-knit construction means you can machine wash and tumble dry our thermals with confidence.



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Australian-made Merino wool clothing
Shipped direct to UK Customers
Merino Skins® Base Layers
Merino Skins® are stylish, high-performance, breathable Merino activewear that combines performance with function. Made from the finest, softest Australian Merino wool, Merino Skins® keep you blissfully warm when needed most. Naturally superior moisture-wicking and odor-fighting, helping you feel great all day, whether you’re skiing, camping, mountain climbing, running, hunting or wearing around the house or office. The unique temperature regulating, odor, UV resistance and moisture controlling properties of Merino Skins® Merino wool base layers ensure you stay at your optimal body temperature in all conditions.
Merino Skins® base layer thermal wear have appeared in various Olympic events, featuring in the opening ceremony of the 2000 Olympic Games in Sydney and as the preferred thermal underwear for the Australian Winter Olympics Team at the 2002 Salt Lake City Winter Olympic Games.
We’re passionate about Australian Wool
Ktena Knitting Mills is an authentic, independently owned Australian manufacturer of high-quality Merino wool thermal and activewear.
Our range of Australian Merino wool garments is designed, knitted, dyed, sewn and packaged at our factory in Melbourne, Australia, ensuring exceptional style and sustained quality.
Ktena Knitting is committed to the authentic Australian manufacture of quality woolen products. We passionately believe in bringing wool to life through our finest Merino wool garments that are soft, comfortable and a pleasure to wear.
As a leading manufacturer of Australian merino wool garments, Ktena embraces the history behind our wonderful woolen knitting mill, with our growing range of uniquely Australian Merino wool products.
Ktena manufactures both Merino Skins® – performance sports style ranges and the famous Thermo Fleece® range – a more casual everyday wear selection.
Learn More – Merino Skins®
Thermo Fleece® Merino Underwear
Thermo Fleece® underwear is the unique result of a perfect blend of sophisticated technology, wool growing in Australia.
Australia’s superfine Merino wools represent over 100 years of expert breeding and refinement, resulting in only the softest, finest and whitest Merino wools in the world. Prickle-free, our Merino wool thermal garments are available in both double knitted interlock fabric and in our exquisitely feminine pointelle pattern fabrics, without side seams and are fully machine washable.
A Thermo Fleece® garment is your guarantee of unsurpassed luxury, comfort and warmth without compromise…naturally.
Why Thermo Fleece?
Thermo Fleece® woolen underwear keeps you warm as toast in the coldest conditions without ever feeling clammy – even if you’re wearing rainproof clothing over the top! Thermo Fleece® merino woolen underwear offers the very best in quality; it’s knitted from 100% pure super soft wool from Australian Merino sheep.
Developed after years of research, Australian super soft Merino wool is blissfully comfortable and prickly free against the skin, yet it’s incredibly easy to care for – the unique double knit interlock and pointelle pattern knit fabric guarantees long wear and no shrinkage, and you can even machine wash it. All garments are also “side seam-free” for supreme comfort. Try Thermo Fleece® woolen underwear and enjoy the difference.
Learn More – Thermo Fleece®











