Arc'teryx Phase AR Bottoms

Priced: $34.99 - $75.00
Half-Moon Outfitters $34.99
46% off
Regularly: $65.00
Mountain Gear $74.95
REI $75.00
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Arc'teryx Phase AR Bottoms -

Thanks to moisture-managing fabric that keeps you comfortable during stop-and-go activities, the Arc'teryx Phase AR long underwear bottoms offer midweight insulation in cold weather.



  • The Arc'teryx Phase AR long underwear bottoms offer a next-to-skin fit
  • Anatomical shaping for fit and comfort


  • Hydrophobic materials will not absorb water
  • A smooth surface makes it easy to put on additional layers, and mechanical stretch woven into the fabric moves with you
  • Midweight polyester and polypropylene fabric wicks moisture to keep you comfortable during high-output activity and dries quickly to regulate temperature
  • Mechanical stretch textile for unrestricted mobility—fabric is inherently stretchy without the use of Spandex fibres, making it more durable
  • Antimicrobial, odour-control fabric treatment
  • Fabric provides UPF 50+ sun protection, shielding skin from harmful ultraviolet rays


  • Breathable


  • Comfort waistband with laminated, soft-brushed finish

Weather and Wind:

  • Flatlock seams feel great next to skin; heat transfer label gets rid of that annoying tag

Size and Dimensions:

  • 73.5 cm inseam


  • Encapsulated silver ions help fight odors
  • Minimal odour retention
  • Gusseted crotch
  • Non-chafing label
Mountain Gear
The Phase AR Bottoms from Arc'teryx are a cold weather baselayer for the serious athlete.

Half-Moon Outfitters
These lightly insulated bottoms are engineered for optimal moisture management during stop-and-go activities. During active phases moisture is wicked across the entire garment, aiding temperature regulation. Entering a rest phase the broadly dispersed moisture evaporates quickly, speeding dry-time to keep the user warmer and more comfortable. Encapsulated silver-ions provide durable and long-lasting odour control.
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Fabric:(Main) 87% polyester/13% polypropylene / (Back-of-knee panels) 70% polyester/30% polypropylene
Fabric Weight:Midweight
Inseam (in.):29 inches
Moisture wicking:Yes
Quick drying:Yes
Style:Full Length
Sun-protective fabric:Yes
Underwear weight:Midweight
Compare specifications to related products.

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Subcategories of Fleece & Base Layers:

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