Thermo Fleece® Thermals

Ladies and Mens Thermals Range

Men's and women's thermal ranges are displayed below in 100% Merino and our unique rich wool blends.

Shop our Thermo Fleece range of thermal underwear, wool thermals and merino thermals.

Thermo Fleece merino underwear
Australian Made and Woolmark Certified

Thermo Fleece® Ladies' (Everyday Range)

Wool Rich Blend

100% Pure Merino Wool

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Thermo Fleece® Men's (Everyday Range)

Wool Rich Blend

100% Pure Merino Wool

View our Size Charts

Ktena Ladies' Range Specifications

Ktena's ladies' range includes our everyday Thermo Fleece® garments and sports style Merino Skins® garments in design styles including sleeveless, short sleeve, long sleeve tops and long john and trunks and are made in various fabric / knit type constructions.

Double Knitted Interlock (Side seam free)

The most stable of all fabrics, this resists warping and retains its shape wash after wash. Our interlock fabrics are knitted in tubular form by our machines programmed to knit individual body sizes. Thus, garments are side-seam free and hug the natural curves of the body.

Rib Pointelle (Side seam free)

Our machinery is programmed to knit specific patterns within this fabric. Each garment is individually knitted with a waistband finish on the body and sleeve ends making hemming unnecessary. Constructed in tubular form, garments are side-seam free and comfortably wrap around the contours of the body.

Shiny Jersey

Single knitted with fine pure merino wool, this is a lightweight super soft luxurious fabric. After the complex and detailed finishing all of our other fabrics undergo, our shiny jersey fabric undergoes a further process known as decatising – where the fabric is placed in high-temperature copper tubing and is placed under extremely high temperature for an extended period – resulting in the fabric being transformed to having a unique sheen. The fabric becomes shiny and has a silky feel and appearance. This fabric is particularly popular in the high end of the market worldwide.

Merino Men's Range

Ktena's men's range includes our everyday Thermo Fleece® garments and sports style Merino Skins® garments in design styles including sleeveless, short sleeve, long sleeve tops and long john and trunks and is made in various fabric / knit type constructions.

Double Knitted Interlock (Side seam free)

The most stable of all fabrics, this resists warping and retains its shape wash after wash. Our interlock fabrics are knitted in tubular form by our machines programmed to knit individual body sizes. Thus garments are side-seam free and hug the natural curves of the body.

Shiny Jersey

Single knitted with fine pure merino wool, this is a lightweight super soft luxurious fabric. After the complex and detailed finishing all of our other fabrics undergo, our shiny jersey fabric undergoes a further process known as decatising – where the fabric is placed in high-temperature copper tubing and is placed under extremely high temperature for an extended period — resulting in the fabric being transformed to having a unique sheen. The fabric becomes shiny and has a silky feel and appearance. This fabric is particularly popular in the high end of the market worldwide.

Waffle Knit

The texture of this fabric is specially designed to give the appearance of miniature rectangle shape cells. These knitted air pockets trap body heat and maintain warmth and comfort.

Thermo Fleece merino underwear

Finest Quality Wool

Ktena Knitting Mills doesn’t just use any old wool – we use one of the highest grades of Merino Wool which is specially selected and graded. Longer than other standard wool fibres – the extra length creates a smooth and silky knitted yarn. Our Merino Wool yarns are soft to the touch and are prickle free, flame resistant and absorb body odour and moisture. After washing, not only does our Merino Wool maintain its elasticity, it also increases its warmth value!

About The Thermo Fleece Brand

Thermo-Fleece Underwear is the unique result of a perfect blend of sophisticated technology, wool growing in Australia and Australia's clean, green environment.

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 thermals are available double knitted, in silky shiny fabric and exquisitely feminine pattern fabrics, without 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! Merino Thermo-Fleece woollen 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, super soft wool is blissfully comfortable and prickle free against the skin. Yet it’s incredibly easy to care for - the unique interlock knit guarantees long wear and no shrinkage and you can even machine wash it. Also, all garments are "side seam free" for supreme comfort.

Only Thermo-Fleece is made from interlock- Double knit fabrics, Silky Shiny Jersey and Feminine Patterned Rib Pointelle Fabrics, your assurance of the garments long life softness, comfort and reliability. Thermo-Fleece is made with prime Australian merino wool making it non-prickly, easy care, super soft and fully machine washable. Try Thermo-Fleece Woolen underwear and enjoy the difference.

Why Wool?

Wool is a remarkable fibre. A wonderful insulator, it will hold in your body heat to keep you warm. And, at the same time, wool has a unique ability to absorb up to three times its own weight in moisture, drawing it away from the skin without feeling damp. Wool does not compromise with quality. Only wool can simultaneously keep you cozy and warm without feeling clammy or damp. Wool is lightweight and ultra soft, your guarantee for perfect comfort and better health.

Merino wool is non-prickly, easy care, and fully machine washable.

Wool is flame resistant absorbs moisture and body odours.

Wool's elasticity and warmth actually increase with washing.

Thermo Fleece® FAQ'S


What is Thermofleece

Thermo Fleece is a range of merino wool underclothing made for men, women and children. It is the unique result of a perfect blend of sophisticated technology, wool growing in Australia and Australia’s clean, green environment.
Australia’s superfine Merino wools represent over 120 years of expert breeding and refinement resulting in only the softest, finest and whitest Merino wools in the world. Prickle-free, Thermofleece 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 merino wool 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 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 prickle 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 woollen underwear and enjoy the difference.

Are Merino thermals worth it?

The answer is definitely yes. Nothing comes close to the warmth, comfort and reliability of merino wool thermals. Thermo Fleece Merino wool thermals insulate your body, keeping you dry when you sweat, cool when you are hot and warm when it is cold. Truly nature’s miracle thermostat. They are well worth it.

What are the warmest thermals?

Merino Wool thermals are by far the warmest thermals available.
This is because of merino wool's warmth relative to the weight factor. Merino wool has a natural loft that traps heat very efficiently between the fibres making it warmer than synthetics of the same weight.

Is merino wool the warmest?

Yes by far, merino wool is the warmest natural fibre you can get. Thermo Fleece merino garments are made from a unique fabric known as double-knitted interlock providing a high level of insulation by trapping warm air between the two layers of interlocked fabric keeping you blissfully warm when you need it most.

What are good thermals?

The best thermals available are 100% Merino Wool thermals.
Thermo Fleece thermals are made from 100% merino wool providing superior wicking abilities, absorption of odours, have a high level of inbuilt UV protection, dry quickly, are static-free, flame resistant, are naturally environmentally friendly and are fully machine washable and dryable – easy care.

Is merino wool warmer than silk?

Merino wool thermals are much warmer than silk because silk absorbs moisture from the skin but unlike merino wool which transports “wicks” moisture to the outside of the garment, the moisture in silk gets locked away inside its structure.

Apart from merino wool being warmer than silk, why would you want to put a fibre made from silkworm insect larvae against your skin that also costs a fortune to buy for no real benefit?

What percentage of merino wool is good?

This is a question we get asked a lot. The answer is simple – the best percentage of merino wool for thermals is 100%. Anything less than 100% the natural miracle benefits of merino wool diminishes. Why add or 'fuse' other inferior fibres such as polyester, modal, acrylic, nylon, elastane, spandex and other marketing terms with natural wool?

The reason some manufacturers add other fibres to wool is to cut down on costs, no other reason. These synthetic fibres they add are approximately 80% cheaper to buy than pure merino wool, a clever way to bulk up the fabric with second-rate fillers, hope no one notices the difference and make more profit for themselves.

What’s the difference between base layer and thermals?

There is no difference, base layer is another way of describing thermal underwear. There are different fibres, fabrics and styles available, we recommend Thermo Fleece Merino wool thermals made from double-knitted interlock fabric.

Does merino wool shrink?

Gone are the days of scratchy wool that shrunk in the wash. Today's Merino wool has been treated with a process known as hercosett making it superwash. Thermo Fleece merino wool thermals are preshrunk with boiling water before sewing and can be machine washed and tumble dried and will not shrink in the wash if the washing instructions on the label are correctly followed.

Are merino wool thermals good?

Merino wool thermals are the best! Take it from thousands of satisfied users around the world who swear that merino wool thermals are the best thermals they have ever worn.

Thermo Fleece thermals are made from 100% merino wool providing superior wicking abilities, absorption of odours, have a high level of inbuilt UV protection, dry quickly, are static-free, flame resistant, are naturally environmentally friendly and are fully machine washable and dryable – easy care.

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