Women's Merino Wool Thermal Underwear

The best women's long thermal underwear is made of ultra-soft, machine-washable merino wool – and it's gorgeous enough to be worn as outerwear

Smitten's Australian merino wool has remarkable thermal properties

Our machine-washable merino wool layers can be worn as sleepwear, exercise gear, underwear or outerwear. We make hard-wearing elegant and comfortable pieces so you always feel stylish, whether someone sees your layers or not.

High quality thermal layers will provide years of comfort and style

Our climate-control merino wool garments come in a mix of fabric blends, and in beautiful colours and patterns. Smooth super-fine merino fabric has superb skin-feel and is completely breathable, helping you to regulate your temperature whether you're walking around town, jogging, hanging out at home or bushwalking. All of our clothes are machine washable, so they'll be the pieces you'll wear again and again for years to come. The whole Smitten range of clothing is designed for all seasons, so you can stay cool or warm by layering, rather than relying only on thermal underwear.

Quality thermal layers will save you money, since they look amazing and last for years.

Don't settle for boring thermals that only last a season. Colour your cold days and your warmer ones too, with trans-seasonal wool garments from the gorgeous Smitten range.

Ethical wool, sourced from Tasmanian and other Australian producers – caring for animals and caring for you

All Smitten merino wool is sustainably grown using non-mulesed sheep here in beautiful Tasmania and other selected regions within Australia. The ultra-fine merino wool in our thermal underwear for women undergoes a stringent process before it touches your body; cleaning and spinning, colouring, design, machining, construction and quality control. The end result is stunning sustainable, natural fibre garments that have been tested in all weather.

Smitten wool is a distinctive, super-soft fabric with incredible breathable, thermal properties, so you can wear the same garment in layers to keep you warm on cool days without bulk, and on its own in warm weather to give you breezy, comfortable style. Merino wool is a beautiful, natural option for sensitive skins, with the convenience of being machine washable. Our products are sewn here in Australia by skilled Australian women, sold by our proud Tasmanian family business.

Women's Merino Wool Thermal Underwear | Made in Tasmania. Inspired By Nature.

Cobalt Blue
Cobalt Blue
Fleece Leggings 270gsm
Quick View
Colour & Size
Black
Plum Purple
French Navy Blue
Cobalt Blue
Fleece Leggings 270gsm $159
Plum Purple
Plum Purple
High Waisted Leggings - Fleece 270gsm
Quick View
Color & Size
Plum Purple
Black
French Navy Blue
High Waisted Leggings - Fleece 270gsm $169
Black
Black
High Waisted Leggings - Lightweight 210gsm
Quick View
Colour & Size
French Navy Blue
Black
Flame Red
Black Stripe
Emerald Green
High Waisted Leggings - Lightweight 210gsm $159
Light Grey Marl
Light Grey Marl
High Waisted Leggings - Midweight 230gsm
Quick View
Colour & Size
Light Grey Marl
Charcoal Marl
Violet Purple
Black
High Waisted Leggings - Midweight 230gsm $169
Black
Black
Heavyweight (360g) Leggings
Quick View
Colour & Size
Black
Steel Grey
Heavyweight (360g) Leggings $169
Black
Black
210g Leggings
Quick View
Colour & Size
Black
Steel
210g Leggings $149
Ivory Pinstripe
Ivory Pinstripe
Leggings (rib)
Quick View
Colour & Size
Black Pinstripe
Ivory Pinstripe
Leggings (rib) $159
Black
Black
7/8th Leggings
Quick View
Colour & Size
Black Grey Stripe
Black
7/8th Leggings $145
Load More Products
Loading more products...