The Womens Knox Dual Active Base Layer is the essential foundation of the Seasonless Collection a first layer designed to feel as beautiful as it performs. Created for women who demand both elegance and technical excellence, it delivers year-round comfort, precision fit, and effortless performance from the very first touch.
Reengineered for 2026, this new generation of Dual Active Base Layers is crafted from a luxuriously fine polyester and spandex blend soft, smooth, and light against the skin, yet with dynamic stretch for unrestricted movement. The bonded seam construction ensures an ultra-flat, sculpted fit that moves with the body, eliminating bulk and pressure points for an experience that feels as sleek as it looks.
Whether layered beneath a Knox armoured shirt or worn for other active pursuits, this intelligent fabric keeps you cool, dry, and fresh never sticky or uncomfortable even in the most demanding conditions.
Enhanced with premium Rudolf textile technologies:
Strategically placed die-cut ventilation zones under the arms and between the shoulder blades deliver superior airflow and temperature regulation, so you feel composed and confident, whatever your pace.
The Womens Dual Active Long Sleeve Top offers a beautifully tailored, feminine silhouette gently contoured through the body with curved bonded seams, and finished with refined detailing at the neckline, cuffs, and hem. Subtle mountain-inspired print panels and understated Knox branding complete the look with quiet sophistication.
Available in Black and Light Grey, the Womens Dual Active Base Layer combines luxury, performance, and versatility a piece as elegant as it is technical, ready for every ride, every season, and every movement.
Chest:Measure around the fullest part of your bust and your shoulder blades.
Waist:Measure around the natural waistline. This will usually be the smallest part.
Hip:Measure around the fullest part of your hips. As a guide this is often 20cm below your waist.
Please note:The measurements given are body measures and we recommend you do not measure over clothing.
| Women’s UK Sizes | International Size | Bust (inches) | Bust (cm) | Waist (inches) | Waist (cm) | Hip (inches) | Hip (cm) |
|---|---|---|---|---|---|---|---|
| 8 | XS | 33 | 83 | 25 | 64 | 35.5 | 90 |
| 10 | S | 35 | 87 | 27 | 69 | 37.5 | 95 |
| 12 | M | 37 | 92 | 29 | 74 | 39.5 | 100 |
| 14 | L | 39 | 97 | 31 | 79 | 41.5 | 105 |
| 16 | XL | 41 | 102 | 33 | 84 | 43.5 | 110 |
| 18 | 2XL | 43 | 107 | 35 | 89 | 45.5 | 115 |
| 20 | 3XL | 45 | 112 | 37 | 94 | 47.5 | 120 |
| UK/AU/NZ | FR/BE/ES/PT | DE/AT/NL/SE/DK/CH/NO | US | Japan |
|---|---|---|---|---|
| 8 | 36 | 34 | 4 | 9 |
| 10 | 38 | 36 | 6 | 11 |
| 12 | 40 | 38 | 8 | 13 |
| 14 | 42 | 40 | 10 | 15 |
| 16 | 44 | 42 | 12 | 17 |
| 18 | 46 | 44 | 14 | 19 |
| 20 | 48 | 46 | 16 | 21 |