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Adults Super Soft Thermal Set in Navy Mystery£23.99 Was £47.99 -
Women's Base Layer Top Ivana in ROSE BLUSH£15.99 Was £31.99 -
Womens Base Layer Top Elianne in DARK GREY£22.99 Was £45.99 -
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Womens Active Top Nettil in Baja Blue Marl£14.99 Was £29.992 colours -
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2 colours -
Unisex Base Layer Top Ghazi in Black£47.99 Was £94.99 -
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Women's Base Layer Trousers Minstrel in DARK GREY£22.99 Was £45.99 -
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Adults Quick Dry Long Sleeve Thermal Top in Black Wise360£12.99 Was £25.99 -
Adults Long Sleeve Thermal Top in Black FLEX360£12.99 Was £25.99 -
Adults Thermal Trousers in Black Yomp360£10.99 Was £20.99
Guide to Buying Ladies Base Layers & Thermal Underwear
Our ladies' base layers keep you warm in various conditions. We have a wide range of styles and fabrics, including merino wool, so you can find a pair to suit any outdoor activity. Our base layers will keep you warm and feeling fresh with built-in high-wicking formulas that will draw sweat away from your skin and evaporate it into the atmosphere. Team your ladies' base layer with a women's fleece jacket for ultimate insulation on your next adventure.
Womens Thermal Base Layers
Our base layers for women are ideal for nighttime jogging or gym exercises because they offer cutting-edge technology such as sweat-wicking materials that keep your body at the proper temperature as you work out. With the Trespass base layer collection, you can look and feel your best while exercising.
We have a wide variety of base layers for women so that you can find the perfect one for your needs. Choose from merino wool, which is fantastic at regulating temperature, or our Coolmax® fabrics, designed to wick sweat away from your skin.
Our thermal underwear is available in various styles so that you can find the perfect one for your needs. Choose from long johns, leggings, or tops, and make sure you stay warm and comfortable all day long.
Womens base layers are available in different fabric weights and constructions to suit temperature, intensity, and layering needs.
- Lightweight womens thermals: Designed for high exertion activities where breathability and moisture control are most important.
- Midweight womens base layers: Offer a balance of warmth and airflow, making them suitable for general outdoor use and variable conditions.
- Insulated womens base layers: Focus on heat retention and comfort in colder weather or lower activity levels.
These options allow womens thermals to adapt easily to both active movement and colder environments.
Materials and How They Work
The materials used in womens base layers directly influence comfort, warmth, and moisture management.
- Polyester: Durable, lightweight, and quick-drying, making it a core fabric in womens thermals.
- Polyamide: Adds strength and abrasion resistance while remaining breathable and lightweight.
- Elastane: Provides stretch to support freedom of movement and a close, flexible fit.
- Merino wool: Naturally insulating and breathable, helping regulate temperature and reduce odour.
- Viscose or rayon: Adds softness and a smooth feel when blended with technical fibres.
- Acrylic: Lightweight and warm, often used as an alternative insulating fibre in knit constructions.
These materials are commonly blended to create womens base layers that balance performance and comfort.
Thoughtful design details improve how womens base layers feel and perform during wear.
- Flat seams help reduce chafing during extended movement.
- Stretch fabrics allow unrestricted motion and flexibility.
- Close-fitting cuts improve moisture transfer and heat retention.
- Ventilation panels enhance airflow in high heat areas.
- Lightweight construction supports comfortable layering.
These features help ensure womens base layers remain comfortable, practical, and effective.
Different outdoor activities place different demands on base layer performance.
- Mountain trekking: Midweight womens base layers provide balanced warmth and breathability in changeable weather.
- Trail running: Lightweight womens thermals support moisture control during high intensity movement.
- Winter hiking: Insulated womens base layers help protect against heat loss in cold temperatures.
- Multi-day expeditions: Quick-drying womens thermals support freshness and comfort over repeated wear.
Matching your base layer to your activity improves comfort and temperature control throughout the day.
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Are base layers only for winter?
- No, womens base layers are useful year-round. Lightweight options work well in cool weather or during high activity, while heavier layers are better suited to winter conditions.
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Do base layers help reduce chafing?
- Yes, womens thermals are designed with smooth fabrics and flat seams to minimise friction. A close fit also helps prevent fabric movement that can cause irritation.
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Are there base layers with odour control?
- Some womens base layers include odour-resistant fibres or treatments, such as merino wool or antibacterial finishes. These help maintain freshness during extended or repeated wear.
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Are there base layers with built-in stretch for movement?
- Yes, most womens base layers include elastane or stretch blends. This allows the fabric to move naturally with the body and improves comfort during active use.
