ArcTeryx Alpha FL 45

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The Arcteryx Alpha FL 45 is an ultralight and highly weather resistant 45 litre climbing pack suited to fast and light alpine, ice, rock and ski mountaineering routes.

Aggressive attention to performance details and our commitment to quality combine in an alpine-ready pack. Highly weather resistant, and designed for the rigours of ice and granite, this is the next level for climbers and ski mountaineers.

Elevated Performance: Our commitment to each subtle detail may seem obsessive, but these details come together to elevate performance. The suspension system offers load support with minimal weight, and the double pull drawcord closure is easy to operate, even with gloves on. Collar serves to extend volume and protect contents when not required.

Lightweight & Super Strong: It begins with the materials. Exceptionally light and strong, N400-AC2 pack fabric is coated inside and out to create an air and water impermeable fabric that resists almost any weather condition. Very resistant to abrasion, the bag can be hauled and dragged through rocky environments and withstands abrasion from ice and snow.

Stripped down to the essentials: Weight can slow you down, so the pack is pared down to the essentials. The N400-AC2 fabric is extremely light for its level of strength. Thermoformed shoulder straps cut weight without eliminating comfort. Every gram counts, so even the seam tape is stripped down to 15mm wide.

Moving fast still requires carrying the essentials. The 45 litre capacity provides enough volume for a long day's ski or a minimalist's multi-day trip. Four attachment points (two on each side) carry skis or a sleeping pad, and the bungee attachment holds crampons or can stash an Alpha FL Jacket for quick access when the weather turns for the worse.


Pack Body: N400r-AC² nylon 6 ripstop is coated on both sides to create an air impermeable, waterproof textile. White pigmented inner surface reflects light to help reveal the contents of the bag. Seams are taped for greater weather resistance.

Back Panel: HD 80 foam is a high density polyethylene foam that provides support and structure to the bag, plus comfort against the back.

Collar: N100mr-HT and N70r-HT are used to create the extendable, water resistant RollTop™ closure.

Shoulder straps: N400r-AC² nylon 6 ripstop, Burly™ Double Weave and Hypercell foam are laminated to each other to create luxuriously soft edged shoulder straps that distribute weight without creating hot spots.



Weather resistant & Durable
WaterTight™ external zippers
Main compartment pocket
External zippered document pocket with key clip
Reflective white interior makes it easier to see items inside the pack
Dual haul loops/carry handles permit hauling or clipping off at a snow anchor
Rigid, formed backpanel provides support and structure while remaining comfortable against the back
Fully seam-sealed for water resistance
Arc'teryx AC² (Advanced Composite Construction) suspension system
Adjustable, removable sternum strap
4 cm/ 1.6 in webbing hipbelt
Thermoformed shoulder strap
RollTop™ closure
Extendable collar with drawcord for additional capacity
Large, webbing pull-tabs for quick and easy, glove-friendly access
Top compression strap
Two ice axe loops
Four integrated side lash points
Includes bungee front attachment system for carrying campons or additional items
Six integrated front lash points

N400r-AC² nylon 6 ripstop is durable and lightweight
N70r-HT nylon 6,6 ripstop
N100mr-HT nylon 6,6 mini-ripstop
HyPUR-cel® Foam
Burly™ Double Weave - 46% nylon, 46% polyester, 8% elastane
HD 80 foam back panel
N400r-AC² nylon 6 ripstop

  • Dimensions text cm: 70 x 35 x 20
  • Manufacturer: Arc'Teryx
  • Rucksack backlength: 46
  • Rucksack hydrationcompatible: No
  • Rucksack iceaxeholder: Yes
  • Rucksack material: N400r-AC² nylon 6 ripstop, N70r-HT nylon 6,6 ripstop, N100mr-HT nylon 6,6 mini-ripsto
  • Rucksack removablebelt: Yes
  • Rucksack volume: 45
  • Weight: 650g

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Tom R.

Excellent product, quality is second

Excellent product, quality is second to non. Looking forward to giving it a proper road test in the Alps this coming summer.