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The ThermaFlow 4.0 Jacket offers sleek, cold-weather protection built for high-performance fall and winter riding.
The ThermaFlow 4.0 Jacket offers sleek, cold-weather protection built for high-performance fall and winter riding.
Leatt

Leatt ThermaFlow 4.0 MTB Jacket in Black

£139.00
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Leatt ThermaFlow 4.0 MTB Jacket in Black

Season:AW25

Brand:Leatt

Code:LE502605485Blac

The ThermaFlow 4.0 Jacket offers sleek, cold-weather protection built for high-performance fall and winter riding. Strategically placed specialty fabric panels combine weather protection, insulation, breathability, and ergonomic stretch—delivering warmth up front with a wind-resistant, brushed fabric, and enhanced airflow out back with a breathable WarmYarn knit. The next-to-skin fit and elongated back are optimized for aggressive riding positions, while five rear pockets (3 top opening, 2 zippered) keep essentials secure. Treated with a PFAS-free water- and dirt-resistant finish and made with bluesign® approved materials, it’s streamlined, sustainable, and built to ride hard when the weather turns cold.

Product Details:

  • Fit: Next to skin fit
  • Sleeve Design: Pre-shaped ergonomic sleeves
  • Back Length: Longer back length with gripper print
  • Seams: Hidden seams with overlocked stitching inside for comfort
  • Hemline: Welded and seamless hemline
  • Zippers: Top quality zippers made by YKK
  • Front Zipper: Durable YKK Vision front zipper with gripper print for easy handling
  • Antibacterial Properties: Natural antistatic and bacteriostatic properties provided by WarmYarn knit
  • Reflectivity: Reflective print on lower back

Fabric and Weather Protection:

  • Fabric Panels: Strategically placed specialty fabric panels optimize weather protection, insulation, breathability, and ergonomics
  • Front Panel/Sleeve Fabric: Wind resistant by weave construction with a brushed backside for insulation and 4-way stretch
  • Back Panel/Sleeve Fabric: Made from a super elastic WarmYarn knit, giving very good insulation and heat management
  • DWR Treatment: Treated with DWR C0, PFAS(PFC)-free, for a more environmentally friendly dirt and water repellent finish
  • Wind Resistance: Low wind resistance
  • Ventilation: Strategically placed fabrics for optimal balance of weather protection and ventilation
  • Drying: Quick drying

Storage:

  • Rear Pockets: 5 back pockets (3 top opening, 2 zippered)
  • Pocket Material: Pockets are made in a lightweight stretch polymer fiber weave for water resistance
  • Chest Pocket: Laser cut zippered chest pocket for phone

Sustainability:

  • Materials: bluesign® APPROVED fabric (the gold standard for more sustainable textiles)
  • Packaging: Plastic-free packaging
Sizing Information
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