Women's Merino Wool Thermal Underwear and Socks

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

Smitten's 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 from local famrs. 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.

Your wool thermal underwear is made of merino, a soft fabric with exceptional thermal properties, letting you wear the same items in layers to keep warm on cool days without bulk, and on its own in summer to stay comfortable. Merino wool is a beautiful, natural option for sensitive skin, with the added convenience of being safe to put in the washing machine. Our products are sewn here in Tasmania by skilled women, and sold by our family business.

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