Arcteryx Alpha FL 45 Backpack

Arcteryx Alpha FL 45 Backpack

Arcteryx Alpha FL 45 Backpack is rated 4.6 out of 5 by 7.
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4.7 Star Rating

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Product Description Item No.   10300055

FEATURES of the Arcteryx Alpha FL 45 Backpack

  • Ultra light design and construction allow climbers full functionality
  • Highly weather resistant AC2 (Advanced Composite Construction) fabric and sealed seams on the main compartment provide the ultimate protection from rain and snow
  • Glove friendly main opening with a pull to open, pull to close drawcord system
  • RollTop extension collar seals the pack for complete waterproof main compartment
  • 4 integrated side lash points, now accommodating straps up to 22mm wide and 6 on the front for lashing extra gear to the pack's exterior such as sleeping pads or skis
  • External bungee compression system can carry crampons, up to 4 ice tools or a bulky belay parka
  • Shoulder strap and sternum strap have been revised for a better fit
  • Top rope strap buckle is now anchored on the back panel for easier use
  • Small external WaterTight zippered pocket with key clip
  • Rigid, formed backpanel provides support and structure while remaining comfortable against the back
  • Reflective white interior makes it easier to see items inside the pack
  • Fully seam-sealed for water resistance
  • Dual haul loops / carry handles permit hauling or clipping off at a snow anchor
  • Adjustable, removable sternum strap
  • Extendable collar with drawcord for additional capacity
  • Large, webbing pull-tabs for quick and easy, glove-friendly access
  • Includes bungee front attachment system for carrying crampons or additional items

- + Product Specifications
Disclaimer: We only ship this brand to US Addresses.
Fabric Details: 46 % Nylon, 46 % Polyester, 8 % Elastane
Waterproof: Yes
Ultralight: Yes
Pack Fabric: Nylon
Weight: 24 oz
Pack Pockets (+ main compartment): 2
Gender: Unisex, Mens
Features: Carry-On Size, Waterproof, Hip Belt, Ultralight, Compression Straps
Best Use: Ice and Mixed Climbing, Climbing, Skiing, Backpacking, Mountaineering and Alpine
Pack Capacity: 32 Liters / 1953 Cubic inches
Trip Length: Expedition
Frame Type: Frameless
Pack Access: Top
Rated 4 out of 5 by from Very nice pack This pack is fantastic. It is light, it carries well, and it climbs well. It is simple, streamlined, and almost perfect. Now that that's out of the way, here are two nitpicks: The sternum strap is both too short and it would be nice if it had a bit of elastic so that it could expand when I'm breathing hard. Some of us have either breasts or muscles in our chest, and the strap is almost too short for me to use. It's downright uncomfortable when I'm breathing hard. The shock cord is not very durable at all. Ice tool blades and crampons destroyed mine fairly quickly. It works great. It just didn't last. Regardless, the pack is still close to perfect. I have both the 30 and the 45, and I'm tempted to get another 30 for my wife as a crag pack.
Date published: 2015-09-03
Rated 5 out of 5 by from Great Alpine Pack This is a fantastic alpine pack. Its slender shape carries well on steep and technical terrain. I was originally worried about the unpadded hip belt but, after several months of use, the lack of padding is not an issue. The unpadded hip belt actually allows for a more comfortable system when using a harness with ice clippers attached. The durable material and taped seams make this a well performing pack in rough and wet environments.
Date published: 2015-10-18
Rated 3 out of 5 by from Disappointing I am an avid fan of Arc'teryx products being the proud owner of many. I purchased my FL45 in Chamonix for a mountaineering course last July. It worked well but we had good weather. Then I returned home to the Lower Mainland where it rains the pack started to disappoint. I am going into K2 on a trek this July and I was thinking this would be my pack for the approach and exit walk. Three times I have been out and got caught on a good, moderate West Coast rain event. My gear and clothes were soaked plus I had an inch of water in the bottom. The problem seems to the main bag is waterproof, but the extension collar and closure fabric are at best lightly water resistant. My solution has been to buy a pack cover. The second issue is the size. This is not a 45 litre pack. It is a 30 litre pack with a 15 litre extension. The distinction may splitting hairs for some, but with your Altra and other lines the added volume provided by the extension collar is stated. Just not like Arc'teryx. I was not concerned that the pack has less hip belt padding than light backpacking packs. Pack it right and the pack is comfortable, at least for me. It does have to be more thoughtfully packed if you are going to use it for trekking Paul. I have put several consecutive days of 6-8+ hours with about 25 lbs. it was fine - for me.
Date published: 2015-04-14
Rated 5 out of 5 by from Light and strong. I’ve found this to be a very well designed and robust bit of kit. Its dead light - it weighs a kilogram less than my old 45 litre rucksack which it’s replaced and it holds just as much as that one did! It’s basically a cylinder of nylon canvas. The regular shape, as much as the white interior, means that I have had no trouble finding and retrieving stuff. It’d probably be waterproof if I didn’t keep opening it and shoving my wet gloved hands inside. The shoulder straps and back padding are certainly minimalist but work well. I’ve bivvied overnight in the Cairngorms and Lochaber this summer with this sack and found it to be more comfortable to carry than sacks with elaborate - and heavy - suspension and back systems. I’m used to rucksacks without a lid and I like the dry bag type opening on this one. If you enjoy painstakingly adjusting straps in bad weather then this ‘sack probably isn’t for you. Its seems to have been designed ‘from the ground up’ and for that reason perhaps doesn’t have some of the features that you might expect – but I reckon it has all the features that you’ll need.
Date published: 2014-11-30
Rated 5 out of 5 by from Great product, for what it is intended! This is a great pack for what it is intended to do.. fast light alpine, but do not let that deter you to buy one for whatever else reason. i got mine in chayenne, love the color, was really bright though at first, but faded a little to a softer red/orange-ish color. Pesonally i've used my pack mostly for cragging and some multipitching trad climbs, and i can fill it up with some soft gear, water a full set of BD Cams, and nut set, harness, and cram down a 9.6 60m rope... this thing swallows ALOT, but yet remains within it boundaries. now we already know that this thing works great for fast & light alpine pushes.. so i wont rant about it, it was what it was built for needless to say, arc'teryx hit the nail on that one. so can it perform out of that box? i'd dare to say yes, but i wont say that it will properly excel at for example long hikes, since it does not have a rigid frame, more or less a foam pad to protect the back, and it does not have any kind of ventilation for the back. so there are some shortcomings to it. one thing id like to see arc'teryx do is the roll closure, to have some stiffer lips, so that you can roll it up to have it open when you don't need the rolltop. but for multipitch sessions, id buy one more! for alpine id buy 2 more, and one for my dog!
Date published: 2015-04-07
Rated 5 out of 5 by from Just completed an 800 km backpack thru Spain incl. the Pyrenees My wife and I just completed the Camino de Santiago via. the Camino Frances route from St. Jean Pied-de-Port France to Santiago de Compestelo Spain including crossing the Pyrenees twice. This is an 800 km backpack through the Pyrenees and across the Meseta (high plains). There are albergues (hostels) and restaurants available. I used the Alpha FL 45 for all 34 days. My pack weighed ~25 lbs including food and water for the day as well as everything that we needed for 6 weeks, but no tent or cooking gear since we stayed in albergues and ate in restaurants/bars. I have nothing but good comments about the pack. The minimalist waste belt wasn't an issue and I found myself walking with it undone much of the time, especially on the steep descents. Water and anything wet was carried outside of the rolltop but inside the extendable collar - I was just able to carry everything with the collar snuggly closed. I also had a bag with 2 Thermarest lightweight air mattresses tucked under the bungee front attachment. I ended up with an extra pair of boots (when the initial pair failed) and I put them on top held down by the top compression strap. I also added 4 straps under the side lash points so that I can carry skis this winter when backcountry skiing. Whenever I took a sweater or rain jacket off they went there. The pack hugged my shoulders and back and it never waivered. I did have to repack from scratch everyday since there aren't any compartments. I would have been handy to have some pockets for snacks, camera, etc., but this is designed to be absolutely simple. My back sweated a lot with the waterproof material tight against it. I teach whitewater canoeing and telemark skiing and spend a lot of time outdoors and plan to use this pack in other activities. I was pleasantly surprised that this pack carried so well, was very comfortable, rain tight and fit all my needs.
Date published: 2014-09-28
Rated 5 out of 5 by from light, tough and waterproof I know this pack was designed for elite alpinists hauling exquisite rock climbing gear. I'm just a backpacker, but the combination of light weight, tough fabric and a waterproof bag was appealing for backpacking. I just did a 6-day trip in the Wind River Range with the pack and it performed very well. It is very tough and definitely waterproof. It is sensitive to balance issues, since the hipbelt is so minimal. Once I got it balanced, it was very comfortable. I started with 30 pounds and ended with about 18. Somewhere around 25-26 pounds would probably be the optimal place to start, but 30 was ok. The water issue is one I'll change next time. I used a small carabiner to attach a .5L Platypus to the chest strap (I stabilized the bottom of the Platypus with a little shock cord and used a tool that went around the neck of the Platypus and offered a loop for attaching the carabiner) and that worked ok. I had two 1L Platypus water containers at the top of the pack (outside the dry bag and under the overstrap). That created some of the balance sensitivity, so I'm going to figure out a way to put those on the outside of the pack using the attachment points and some velcro. That will make the water accessible enough and help with balance. While everyone else was worried about their pack covers, I just smiled and kept hiking. It was very nice!
Date published: 2014-08-25
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- + Size Guide

Hipbelt Sizing
SIZE Small Medium Large
Men's 27 - 32" 32 - 37" 37 - 42"
Women's 25 - 30" 27 - 32" 30 - 35"

How to Find Your Foot Measurements

Arc'teryx packs are sized either in 3-length options: Short (S), Regular (R) and Tall (T), or in 2-length options: Short/Regular (SR), and Regular/Tall (RT).

Sizing refers to YOUR OWN BACK LENGTH

Measure your Back:

• Measure along the spine between the 7th cervical vertebra and the level of the hip iliac crest
• Compare this measurement to the Sizing Charts
• It is possible to interchange different size shoulder strap and hipbelt components on many Arc'teryx Packs, but this will not change or affect the back-length of the pack.

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