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Arc'teryx Beta AR Pant - Men's

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sale $374.25 Original price:$499.00

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Beta AR Pant

Loaded with a bevy of smart features and technical fabric details, the Arc'teryx Men's Beta AR Pant protects you from the elements when you're facing down gale-force winds, heavy snow squalls, and freezing temperatures. Featuring Gore-Tex Pro 3-layer membrane/laminate construction, these pants are seriously equipped for the worst weather on the planet. Furthermore, you'll appreciate the pant's athletic fit, with ergonomic-3D patterning for exceptional freedom of movement over base layers.

Arc'teryx placed a Gore-Tex 3-layer Pro membrane/laminate throughout the entire pant, but with slightly varying face fabrics in strategic locations or what it dubs as "Hybrid Mapping" technology. Basically, you'll find N40r-X Gore-Tex Pro 3-layer body for lightweight, ultra-breathable performance, without sacrificing premium waterproof protection. Reinforced along the seat, knees, and lower legs, N80p-X Gore-Tex Pro 3-layer construction beefs up durability, allowing for worry-free wear in the most grueling environments on earth. Add in fully taped seams and watertight zippers for a near-impenetrable fortress against all-day deluges, sopping spring snow, and deep powder.

And because these pants are designed for alpine climbing and ski-mountaineering approaches, you'll find an adjustable webbing belt that tightens comfortably under your favorite climbing harness, as well as 3/4-length ventilation zippers for easy integration over crampons. Other key features included Keprotec instep patches for enhanced protection against crampon and boot-related damage, as well as Cordura PowderCuffs with bootlace hooks to seal-out snow and outside moisture.

  • N40r-X Gore-Tex Pro 3-layer (body)
  • N80p-X Gore-Tex Pro 3-layer (seat, knees, lower legs)
  • Fully taped seams
  • 3/4-length side zips
  • Watertight zippers
  • Adjustable webbing belt
  • Keprotec instep patches
  • Cordura PowderCuff with bootlace hook
  • Item #ARC00B0

[membrane/laminate] (body) N40r-X Gore-Tex Pro (3-layer), (seat, knees, lower legs) N80p-X Gore-Tex Pro (3-layer), [instep patches] Keprotec, [PowderCuff] Cordura
fully sealed
athletic, with e3D patterning
1 zippered hip, 2 zippered hand
3/4-length side zips
adjustable webbing belt
Side Zips
yes, PowderCuffs
Claimed Weight
1 lb 2.9 oz
Recommended Use
skiing, snowboarding, backcountry touring, alpine & expedition
Manufacturer Warranty

Tech Specs

What do you think about this product?



Arc'teryx: Beta AR Pant Men's

Focused on streamlined performance with minimal weight and bulk, these lightweight GORE-TEX® Pro pants are the ultimate in packable four-season protection. Built tough with reinforced knees, seat, and lower legs, they also feature Keprotec™ instep patches to guard against crampons, ski edges and boots. A trim athletic fit with articulated shaping delivers mobility and powder cuffs keep snow at bay.


I am 5ft4in tall.160lb.Normally,I wear 32waist Levi’s jeans.What size should I buy?

Kyaw! I am one of our Arc'teryx ambassadors and would love to help. As for the pants, I would recommend you purchasing a size medium short or medium regular. If you have a shorter inseam than 30 inches I would recommend the short. The pant is a great option for you though, and you will be very happy with it! The medium at 33 inches waist will be perfect once you layer with it and use the integrated belt.


Are these pants not waterproof and windproof? I dont see that specifically in the tech specs like other pants. Are these better than the Arc'teryx Alpha SL Gore-Tex Pant? Seems like the Alpha should be better, which has full zips and is listed as a guaranteed waterproof and windproof shell. Yet that one is much less expensive. What am I missing?

Hey Scott, These will be both water and windproof, they're designed to be used in full on winter conditions. The Alpha SL is going to be meant as a much more lightweight hiking/camping waterproof pant option as oppsed to the Beta AR being designed for winter use. The best pant will depend on what you're planning on using them for mostly. Feel free to reach me at my direct line 801.204.4547 or my email if you have any other questions on either of these pants! Best, Connor