Grey Rab Men's Flux Pants image 1
Grey Rab Men's Flux Pants image 2
Grey Rab Men's Flux Pants image 3
Grey Rab Men's Flux Pants image 4
Grey Rab Men's Flux Pants image 5
Grey Rab Men's Flux Pants image 6

Key featuresexpand_more

Made with a fast-wicking, high-stretch Thermic™ fleece paired with built-in odour-control technology, the Men’s Flux Pants from Rab are the perfect midweight baselayer pant for hiking, trekking and cold weather activities.

Their double layer waistband and slim fit keep them comfortably in position when layers are added.

While the Men’s Flux Pants are designed to help you move fast during winter in the mountains, they’re equally comfortable as lightweight standalone leggings for year-round use.

  • Thermic™ single jersey knit with brushed back
  • Polygiene® STAY FRESH odour control treatment
  • Low bulk waistband with drawstring adjustment
  • Flatlock low bulk seams
  • Fit: Slim
  • Main Fabric: Thermic brushed back lightweight fleece, 175g/m²
  • Composition: 94% polyester/6% elastane
  • Weight: 180g (estimate)

Delivery & Returnsexpand_more

This product qualifies for the following delivery methods.

Standard Delivery (£4.95)

FREE on orders over £80.00

A tracking link will be provided once your order is despatched.


Returning orders to us is easy. Whatever your reason, we offer a refund or exchange within 28 days of delivery or collection.

Size guideexpand_more

XS 71 76 81 86
S 76 76 81 8C
M 81 76 81 86
L 86 76 81 86
XL 91 76 81 86
XXL 96 76 81 86


Overall rating

4.00 out of 5
1 review
Write a review
4 out of 5

Just worn these pants...

Just worn these pants for a weeks skiing under my ski pants and they were great. If they had a hole in the front for trips to the toilet I would have given them 5 stars!

Apart from that, they are warm, comfortable and light weight. A good purchase.


[Klarna logo]

Pay in 3 interest-free payments of £15.00.

Klarna's Pay in 3 / Pay in 30 days are unregulated credit agreements. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Late fees may apply. Ts&Cs apply.

Learn more

[Laybuy logo]

6 interest-free weekly payments of £7.50.

Laybuy is an interest-free credit product allowing you to pay for your purchase over 6 equal weekly instalments. Missed payments will show on your credit file potentially making credit harder to obtain and will result in late fees being added to the debt.

Learn more

[Clearpay logo]

4 interest-free fortnightly payments of £11.25.

Clearpay is unregulated credit. Use responsibly. T&Cs & late fees up to £24 per purchase apply (

Learn more

Blacks Help

Sorry to hear that you are having an issue. For us to help you further please quote the following to our customer care team.

peopleCustomer Care Hub emailEmail phonePhone