Alpha AR 55 Backpack
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Arc'teryx
Packs Size Chart
| Size | Unisex (cm/in) | Women's (cm/in) | Men's (cm/in) |
| Short | 42.5cm - 47.5cm (16¾" - 18¾") | 40.75cm - 44.25cm (16" - 17½") | 44.75cm - 48.25cm (17½" - 19") |
| Regular | 46.5cm - 51.5cm (18¼" - 20¼") | 43.25cm - 47.5cm (17" - 18¾") | 47.25cm - 51.5cm (18½" - 20¼") |
| Tall | N/A | 46.5cm - 51.5cm (18¼" - 20¼") | 50.5cm - 55.5cm (19¾" - 21¾") |
How to find your measurements
Note: Calculate your own body measurements, then select your product size.
- Back Length: To determine your size, measure down the spinal column from the 7th cervical vertebra and the level of the hip iliac crest.
- Shoulder strap: Sizing refers to bust/chest circumference. Measure around the bust/chest at the fullest point.
- Hipbelt: Sizing is based on a measurement around the hip iliac crest. Measure around the body at the top edge of the hip iliac crest, approximately 2 inches below the point at which you would measure your waist.
- Low stock - 1 item left
Pairs well with
Our 55-litre Alpha AR is your pack for epic multi-day climbs. Made to withstand rock, ice, and alpine environments, it’s built from our 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.
Technical Features
- Weather resistant
- Durable
Pack Attachment Configuration
- 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
Pack Compression Strap Configuration
- Top strap securely holds ropes
Pack Design & Construction
- 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
Pack Dimensions
- Alpha AR 55 Backpack = Length (REG/SRT): 66/62cm, Width: 30cm, Depth: 26cm, Centre Back (REG/SRT): 59/55cm
Pack Hydration
- Micro-webbing hydration hose loops
- Hydration port allows for ease of tube passage outside of main compartment
- Hydration reservoir sold separately
Pack Lid Configuration
- Top lid with WaterTight™ zipper can be extended or removed
Pack Loading & Closure Configuration
- Pull-to-open / pull-to-close drawcord main compartment for easy access
- WaterTight™ side zipper gives quick access to main compartment
Pack Pocket Configuration
- Main compartment pocket
- Security pocket under lid with key clip stores phone, keys and other small items
Pack Suspension Configuration
- Padded, contoured shoulder straps
- Padded, breathable hipbelt
Sustainability
- 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.
Materials
- French Regulation: AGEC Law - Article 13
- Origin of fabric: KOREA
- Origin of dying: KOREA
- May release plastic microfibres into the environment when washing
- Hadron™ - N315r HT nylon 6,6 LCP - bluesign Approved Material, FC0 DWR
Climb On Equipment offers free in-store pick up and ships within Canada & USA (some restrictions apply).
Most orders qualify for free shipping when over $99. Heavy/bulky items such as bouldering pads and faster shipping options do not qualify for free shipping.
Work & Rescue Orders may qualify for volume discounts. Volume discount orders do not qualify for free shipping. For a more detailed information on shipping, please go to our Shipping Policy page or learn about Returns and Warranty.