41% off Arc'teryx Men's Beta AR Pant
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Arc'teryx Men's Beta AR Pant

Rated 4.8 out of 5 by 4 reviewers.
Rated 5 out of 5 by Superb Waterproof Trousers Thes Gore Tex Pro trousers are superb, I use them for both my scooter and golf. The internal gaitor ensures your ankles stay dry. These lighweight trousers fit perfectly and look great 29 September 2015
Rated 5 out of 5 by Arcteryx at its best Best pair of waterproof pants I've bought,can use them in various outdoor activities , 14 September 2015
Rated 5 out of 5 by top product climbed the Mont Blanc this year, the trousers are highly recommended - top quality, very light 14 September 2015
Rated 4 out of 5 by Main material too flimsy, IMHO. Successfully summited Imja Tse (yay!) in them but ripped the leg on the inside just above the calf with my crampons half way up the wall. Was surprised that what appeared to be ripstop was pretty much just eye-candy. An 8cm hole just above the thicker crampon guard material was done in an instant, before I even managed to notice I had caught my £260 pants. 17 November 2014
  • 2015-11-29 T10:49:23.973-06:00
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The Arc'teryx Beta AR pant is a lightweight four season pant made using GORE-TEX® Pro Shell. Built for rugged use, it has Keprotec™ instep patches and reinforced seat and knees. Laminated powder cuffs block snow, and WaterTight™ side zips make venting and layering simple.
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Was: £270.00 Now: £159.00

  • Colour: Black
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Size guide
Code: ARC0413KK

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The Arc’teryx Beta AR Pant is a durable, lightweight and packable, waterproof, four-season pant. Focused on streamlined performance with minimal weight and bulk, the Beta AR pant is made using 2 versions of GORE-TEX® Pro 3L fabric. One version is supple and soft-to-the-touch yet hardwearing, waterproof and breathable, while the other is extremely abrasion resistant and used to reinforce high wear areas.


  • Fabrics: N40r GORE-TEX® Pro 3L/N150p GORE-TEX® Pro 3L/Keprotec™ instep patches protect against ski/snowboard edges, crampons, boots etc.
  • Reinforced knees, seat
  • Athletic fit with e3D patterning – provides maximum articulation which aids freedom of motion
  • ¾ length WaterTight™ side zippers
  • Hip stash pocket with zipper
  • Belted waist
  • WEIGHT: 491g


GORE-TEX® ProProvides the highest level of durable waterproof/breathable performance available. GORE® Micro Grid Woven Backer delivers garments that are consistently the lightest and most compact in the industry. GORE-TEX® Pro has a sparsely woven nylon backer that is twice as durable as traditional tricot liners and allows moisture vapour to pass quickly through to the GORE-TEX® membrane.
N40r GORE-TEX® Pro 3LA high tenacity nylon face fabric with a flat filament warp and false twist fill textured yarns. This lightweight ripstop fabric has a micro-grid woven backer and DWR finish
N150p GORE-TEX® Pro 3LA durable plain weave nylon fabric with a flat filament warp and false twist fill. A durable micro-grid woven backer reduces weight and is highly abrasion resistant. DWR finish.
DWRA finish applied to a fabric that will bead-up water on its surface to stop it soaking into the fibres. This maintains breathability and shortens drying times
Keprotec™Made with reinforced Kevlar fibres, it is extremely resistant to cuts and abrasions, as well as oil, water and general dirt.
E3D patterningErgonomical 3-Dimensional patterning brings an additional level of articulation to provide enhanced mobility. E3D refers to an allowance in the garment patterning to provide extra gusseting and/or articulation in key joint areas to allow for maximum movement.
WaterTight™The world’s first WaterTight™ zippers to pass the W.L. GORE® extreme wet weather test.