- Ultra-warm – The women's base layer top features a dual-layer fabric with an ultra-warm, brushed interior and a smooth, fast-drying exterior.
- Strategic ventilation – With mesh underarm panels, the thermal top gives breathability only where you need it, so you stay warm and dry.
- Sweat-wicking – Even in fast-action, stay dry with the winter running top's sweat-wicking, fast-drying material, which features anti-odour technology.
- Streamlined-fit – The thermal long sleeve's fitted cut isn't too tight or loose. It sits against the body like a second skin, ideal for layering.
- Material and fit – Under Armour Women's UA Authentics Crew, women's base layer top, compression top, material: 87% polyester/13% elastane.
Women's Base Layer Tops
Under Armour Women's UA Authentics Crew, Ultra-Warm Women's Base Layer with Crew Neck, Long Sleeve Thermal with Anti-Odour Technology
Original price was: £42.75.£37.00Current price is: £37.00. (as of 05/12/2026 16:16 PST - DetailsProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)
Ultra-warm – The women’s base layer top features a dual-layer fabric with an ultra-warm, brushed interior and a smooth, fast-drying exterior.
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