Knox Max Dual Active Base Layer Top | Men's | Grey | 69603
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Size chart Knox Base Layer Men
| Men's UK size | Chest (inch) | Chest (cm) | Waist (inch) | Waist (cm) |
|---|---|---|---|---|
| S | 35-37 | 90-96 | 30 | 76 |
| M | 38-40 | 98-103 | 32 | 81 |
| L | 41-43 | 104-109 | 34 | 87 |
| XL | 44-46 | 110-115 | 36 | 92 |
| 2XL | 46-48 | 116-121 | 38 | 97 |
| 3XL | 48-50 | 122-127 | 40 | 102 |
| 4XL | 50-52 | 128-134 | 42 | 107 |
| 5XL | 52-54 | 135-141 | 44 | 112 |
- Worldwide shipping
- Genuine parts & verified quality
- Personal email support
- 14-day returns — in stock ships within 24h
Shipping & Returns
We ship with DHL and FedEx — express on request. If an item is in stock, express delivery can often go out within 1 business day. Standard delivery takes about 2–5 business days domestically and usually around a week worldwide. Please check the available shipping options and delivery times in your cart, as we offer several carriers depending on the country.
Returns must be registered in advance by email and are possible in line with our cancellation policy (14-day return request + 14-day return window after approval). Please note: unregistered returns are not accepted. You'll find all details on conditions, exceptions and refunds in our cancellation policy.
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Hour five in the saddle and the last thing on your mind should be what you're wearing underneath. The Knox Max Dual Active base layer top is engineered for exactly that kind of day — a close-fitting, seasonless foundation that manages moisture, resists odour, and keeps you comfortable from the moment you pull on your jacket to the moment you take it off.
Key Features
- HYDROCOOL® technology pulls sweat away from the skin rapidly, keeping you dry during demanding rides
- SILVERPLUS® antibacterial finish controls odour on long days and multi-day tours
- Highly breathable and quick-drying construction works year-round — cooling in summer heat, insulating in cooler conditions
- Flat-seam construction eliminates pressure points and chafing under a leather suit or textile jacket
- Slim, athletic cut sits close to the body without restricting movement or bunching under gear
- Easy to pull on and off beneath a one-piece suit, making stops and changes effortless
All-Day Comfort, Built Into the Fabric
The Max Dual Active is constructed from a premium melange polyester functional fibre developed specifically for motorsport use. The dual-technology fabric does two jobs simultaneously: HYDROCOOL® accelerates moisture transport away from the skin, while SILVERPLUS® uses silver-ion treatment to suppress bacterial growth — the root cause of odour on longer rides. The result is a base layer that feels fresh even when conditions are anything but.
Flat-locked seams run throughout the garment, eliminating the ridges that cause hotspots under close-fitting motorcycle gear. The athletic, body-close cut moves with you rather than against you, whether you're tucked on a sportsbike or upright on a long-distance tourer.
Seasonless Performance
Most base layers make you choose: either a lightweight summer option or a warmer winter alternative. The Max Dual Active sidesteps that compromise entirely. Its breathable structure vents effectively in warm weather, yet the close fit retains enough body heat to remain comfortable on chilly mornings. One garment, one drawer, twelve months of use.
Suited To
- Track days and circuit riding
- Spirited road riding
- Touring and long-distance travel
- Year-round commuting
Fit and Ergonomics
Designed specifically for the riding position, the Max Dual Active features a sport-specific cut that accounts for the forward lean of a motorcycle rider. There is no excess fabric to fold or bunch beneath a jacket, and the close fit ensures the HYDROCOOL® system stays in direct contact with the skin where it can work most effectively. Available in sizes S through 3XL to suit a wide range of riders.
Care
- Machine washable
- Quick-drying after washing
- Low-maintenance in everyday use
Specifications
| Specification | Detail |
|---|---|
| Manufacturer | Knox |
| Material | Polyester / functional fibre with HYDROCOOL® & SILVERPLUS® |
| Properties | Breathable, quick-drying, antibacterial |
| Fit | Athletic / close-fitting |
| Application | Year-round (summer & winter) |
| Manufacturer | Knox |
|---|---|
| Material | Polyester / functional fibre with HYDROCOOL® & SILVERPLUS® |
| Properties | Breathable, quick-drying, antibacterial |
| Fit | Athletic / close-fitting |
| Application | Year-round (summer & winter) |
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// Knox
Knox Max Dual Active Base Layer Top | Men's | Grey | 69603

Tech specs
- Manufacturer
- Knox
- Material
- Polyester / functional fibre with HYDROCOOL® & SILVERPLUS®
- Properties
- Breathable, quick-drying, antibacterial
- Fit
- Athletic / close-fitting
- Application
- Year-round (summer & winter)
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
Frequently asked questions
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