Arc'teryx Alpha FL 45 Backpack

Priced: $238.95 - $239.00
Arc'teryx Alpha FL 45 Backpack
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Color: Cayenne
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Arc'teryx Alpha FL 45 Backpack -

The Arc'teryx Alpha FL 45 Pack is an ultralight backpack for rock, ice or alpine climbing. The N400r-AC² nylon 6 ripstop fabric is durable, light and weather-resistant so it can take a beating on your next adventure. A coating on both sides of the fabric and taped seams increase the water-resistance. The RollTop closure keeps gear dry and secure and extends for extra gear. An easy to use drawcord provides additional protection when not utilizing the full volume. Small items can be tossed into the front zippered pocket for quick access and to prevent loosing them to the bottom of the bag. The bungee provides a spot to lash your crampons and ice axes to the outside while protecting your other gear.

FEATURES of the Arcteryx Alpha FL 45 Pack.
SPECIFICATIONS of the Arcteryx Alpha FL 45 Pack.


  • Weatherproof RollTop extension collar with compression strap
  • N400r-AC nylon 6 ripstop N100mr-HT nylon 6, 6 mini-ripstop (primary collar) N70r-HT nylon 6
  • Double-pull drawcord collar is easy to open and close, even when wearing gloves
  • Extension collar tucks inside allowing for quick access via the draw cord opening / closure
  • Weatherproof RollTop extension collar adds additional carrying capacity


  • The Arc'teryx Alpha FL 45 Pack features a top compression/rope strap, dual haul loops, adjustable sternum strap, hipbelt clip points and zippered external security pocket
  • 40 mm / 1.6 inch wide hipbelt with clip points for gloves, spare gear, sleds, etc


  • WaterTight zipper on the external stash pocket for storing smaller items


  • Thermoformed shoulder straps have luxury soft edges for better comfort while maintaining even load distribution


  • N400r-AC2 nylon 6 ripstop is super durable, lightweight and waterproof
  • Ripstop nylon is coated on both sides and features taped seams to create an air-permeable, waterproof pack fabric; white inner surface makes it easy to see contents
  • Water-resistant, super-durable fabric with fully-taped seams
  • AC2 (Advanced Composite Construction) suspension is ultra-light, supportive, and provides push through protection
  • 15 mm seam-taped N400r-AC2 construction is highly weatherproof
  • 6 ripstop (extension collar) No stays HD-80 Foam Burly Double Weave Hypercell foam

Lining and Layers:

  • Front and side external lash points and bungee cord make it easy to attach extra layers, helmet, crampons, tools, skis or sleeping pad


  • 4 side integrated lash points allow for carrying skis, sleeping pads, or use with compression straps (not included)
  • Harness features a 1.6 in. webbing hipbelt, soft-edge shoulder straps with laminated foam padding and a high-density foam back panel for carrying light or heavy loads


  • Top compression / rope strap


  • Double-pull draw cord opening / closure is glove friendly
  • Reflective white interior makes it easier to see inside the pack
  • Dual haul loops permit hauling on route or clipping off at belays
  • Carries two ice tools / mountaineering axes
  • Water-resistant roll-top closure saves weight, extends the pack's volume from 32 liters to 45 liters and allows easy access to the main compartment

If you frequently find yourself on long, technical, and committing rock and ice routes where you need to have plenty of gear with you, or serious ski mountaineering expeditions where getting up is at least as serious as getting down, you need a pack like the Arc'teryx Alpha FL 45 Backpack. Made of water-resistant ripstop nylon with fully-taped seams, the FL 45 features a RollTop collar and top compression strap that eliminate the weight of a traditional 'brain' design and extend to give you an additional 800 cubic inches of storage, all while remaining extremely watertight. You'll probably be wearing it all day, so Arc'teryx made sure that the high-density foam back panel provides plenty of support and is extremely comfortable, and made the thermo-formed shoulder straps from Hypercell foam to relieve pressure points and distribute weight evenly.

Even though it's small and incredibly streamlined, the FL 45 has most of the gadgetry you'd expect to find on a fully-featured mountaineering pack. Dual haul loops let you drag it up behind you if you so desire, while side loops hold your ice axes and the hip belt has clip points for gloves and spare gear. There are six lash points on the front to make strapping gear on a breeze, lash points for ski-carrying, and additional bungees to hold a spare layer securely. There's even a watertight security pocket to hold your valuables, and a reflective white interior to help you find small items. If you don't make it to the top, you know it's not your packs' fault.
Climbing and alpine focused systems with a fast and light design, the Alpha FL 45 Backpack from Arc'teryx® keeps you on the straight and narrow.
Large main compartment can hold all your essentials for a success hike.
White interior for heightened internal visibility.
PU coated inside and out making it water, snow and even air-impermeable .
RollTop™ provides a weatherproof seal, extends the packs volume and when not needed tucks inside the pack for quicker access.
WaterTight™ external zippers block out all the elements.
Glove-friendly draw cord opening for easy access during freezing conditions.
Arc'teryx AC² (Advanced Composite Construction) suspension system with an adjustable, removable sternum strap to help with heavy loads.
Shoulder straps are soft-edged and carry extremely comfortably with heavy or light loads.
Unique laminated shoulder strap construction that delivers comfort without unnecessary weight.
Back panel is made of HD 80 foam that is a high density polyethylene foam that provides support and structure to the bag.
External lash points can be used to attach tools, crampons, extra layers, helmets or sleeping bags.
• Two ice axe loops.
• Six integrated front lash points.
• Bungee front attachment system for added carrying space.
Seams are taped for greater water resistance.
Made of a unique nylon fabric, N400-AC² that shreds weather.
Wide nylon waistbelt that is 1.6" wide.
Part of the Alpha Series.

The Arc'teryx Alpha FL 45 Pack offers climbers and alpinists an ultralight, durable and highly weather-resistant pack that's paired down to be as simple as possible with no extraneous straps or parts.


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Adjustable torso:No
Bottom Width:9 in
Depth:5 1⁄2 in
Extends To:2746 cubic inches / 45 liter
Fits torso:18 - 20 inches
Fits waist/hips:32 - 37 inches
Frame material:Foam
Frame type:Internal
Gear capacity (L):32 liters
Gear capacity (cu. in.):1,831 cubic inches
Height:20 in
Material:Ripstop nylon
Middle Width:9 in
Number of exterior pockets:1 + main compartment
Number of stays:None
Pack access:Top
Pack loading:Top
Raincover included:No
Sleeping bag compartment:No
Strap Drop:10 in
Strap Length:24 in
Suspended mesh back panel:No
Top Width:9 in
Volume:1953 cubic inches / 32 liter
Weight:24 oz / 680 g
Weight - metric:0.61 kilograms

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