Alpha AR 55 (Fall 2022)



The 55-liter Alpha AR is your pack for epic multi-day climbs. Made to withstand rock, ice, and alpine environments, it’s built from Arc'teryx's Hadron™ LCP (liquid crystal polymer) grid fabric - a proprietary material redefining the standard for lightweight abrasion resistance and durability. A removable framesheet and lid let you shed weight, and the main compartment is accessible via WaterTight™ side zip or pull-to-open/pull-to-close top. Custom daisy chains and dual dog bones securely attach tools and gear, the ergonomic hipbelt and harness provide a comfortable carry, and rope straps under the lid.


Brand Name:
Mfg Sku/Part Number:
Pack Volume:
55 liters
Length (REG/SRT): 66/62cm
Width: 30cm
Depth: 26cm
Center Back (REG/SRT): 59/55cm
Hadron™ - N315r HT nylon 6,6 LCP
Other Features:
  • Weather resistant
  • Durable
  • Six integrated front lash points
  • Custom webbing daisy chains for lashing items, ice pick capture webbing accommodates a range of angles
  • Dual dog-bone tool attachments
  • Top strap securely holds ropes
  • Removable framesheet and back panel for versatility and packability
  • N315r-LCP fabric is a high tenacity nylon with a liquid crystal polymer ripstop grid
  • Custom webbing daisy chains for lashing items, ice pick capture for a range of angles
  • Hydration port allows for ease of tube passage outside of main compartment (hydration reservoir sold separately)
  • Micro-webbing hydration hose loops
  • Top lid with WaterTight™ zipper can be extended or removed
  • Pull-to-open / pull-to-close drawcord main compartment for easy access
  • WaterTight™ side zipper gives quick access to main compartment
  • Security pocket under lid with key clip stores phone, keys and other small items
  • Main compartment pocket
  • Padded, contoured shoulder straps
  • Padded, breathable hipbelt
  • Contains materials that meet the bluesign® criteria
  • Self fabric uses PFC-free DWR: PFCs are a class of chemicals used to provide highly effective water repellency to textiles, but are known to persist in the environment.

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