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Arcteryx Alpha FL 45
    Arcteryx Alpha FL 45
    Purchase Arcteryx Alpha FL 45
    • Arcteryx Alpha FL 45

    • £144.00 (RRP:£160.00, Save 10%)

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    • Delivery: Order by 2pm for same day dispatch (M-F).
      Full UK and International Delivery details.

    • Rewards: You'll earn a Facewest Credit of £7.20 with this item. Details here.


    The Arcteryx Alpha FL 45 is a great minimalist 45 litre pack for fast and light use in the mountains. Ideal if you're rock climbing, alpine climbing or ski mountaineering.

    It's very light for a pack for its size, yet don't let this deceive you the AC2 ripstop nylon is super, super tough. The pack has a simple Roll Top closure that when fully extended gives the pack it's full capacity. When it's rolled right down, the capacity can be reduced to 32 litres.

    The AC2 Nylon is coated on both the inside and out and is backed up with taped seams, creating an air tight and waterproof fabric that is also highly durable. The inside of the pack has been coloured white to help reflect light into the pack, enabling you to get to the contents quicker. The back panel is formed from high density polyethylene foam, providing excellent support while maintaining the structure. Though this is a minimalist fast and light pack, it does include lashing points allowing crampons, a helmet or a sleeping pad to be carried on the outside.

    Arcteryx Alpha FL 45 Features

    • N400r-AC2 nylon 6 ripstop fabric
    • N70r-HT nylon 6,6 ripstop in primary and extension collar
    • Sealed seams
    • Roll Top
    • Hypercell foam laminated shoulder straps
    • External WaterTight zipped pocket
    • 4 intergrated side lash points
    • 6 intergrated front lash points
    • Compression system can carry crampons and tools externally
    32L and extends to 45L

    Video Content

    Size Guide

    Arc'Teryx Pack Sizing

    Back Length: From the base of the neck to the narrowest part of the waist.

    Your Body Measurements in Inches:

    Size Back Length
    Regular 18" - 20"
    Tall 19" - 21"

    Customer Reviews of Arcteryx Alpha FL 45

    Arcteryx Alpha FL 45 Review
    Verified Buyer

    I am an ML based in Ireland but spend a lot of time in scotland during winter. Bought this rucksac to primarily reduce my carry load and to simplify what I take. Very surprised and impressed with the sack which I have tested on a few hillwalks since it arrived last week. Stunning bomb proof rucksac - comfortable even with 15 kg load. Plan to use for winter mountaineering and for the odd kayak adventure - easily holds enough for overnight stay in bivi or snow hole! Great Arcteryx build quality and attention to detail for such a minimalist rucksac.

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    Arcteryx Alpha FL 45 Review
    Verified Buyer
    Hope Valley, Derbyshire

    I am a mountaineering instructor and keen climber and use my equipment regularly both for work and play in the mountains of the UK and overseas.I love everything about this rucksack.It is super light, super simple and yet works superbly.Having said that, there are all the features you need and, despite its light weight, it is proving to be very durable due to the excellent materials and solid construction.I have yet to use it within axes attached but tried the system out at home and see no reason why it won't work really well.The shoulder straps are comfortable and waist belt, although unpadded and simple, works fine for walk ins to routes or mountaineering. It will fit everything needed for a day or overnight in the mountains and still be compact enough to climb with.This is really everything I could wish for in a good mountain pack.

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    Arcteryx Alpha FL 45 Review
    Geoff Vader
    Verified Buyer

    I'm a keen climber and hiker. I've used the Alpha FL 30 for the last 2 years as my main mountain pack and it's been completely bombproof so it wasn't a difficult decision to buy the Alpha FL 45 to cram in a sleeping bag and tent or bivy for any overnight excursions. The Alpha 45 comfortably swallows up my sleeping bag, down mat, bivy bag, MSR reactor, food, 2 litres of water, belay jacket, climbing rack and was still as comfortable to carry as any other pack I've owned.

    Previously I've used the Osprey mutant 38 and Crux AK37 and I've ruined them quicker than I'd like though I have to be honest I'm really hard on my gear don't tend to look after it terribly well. The material used for the Alpha FL is amazing. It's exactly the same as the material used in Arcteryx's duffel bags and I've yet to wear a hole in it whether it's been dragged along in the airport or up a granite chimney. I'm not sure if Arcteryx market the Alpha FL packs as waterproof but after 7 hours of walking and scrambling it hadn't let any water in.

    For me the lack of features is a bonus as I hate faffing around. This might not appeal to everyone though. It does require a bit of care when packing otherwise at can feel a little unstable however if you're seriously considering this pack I'm pretty sure you know the right way to pack your gear away! The roll top closure is great and I can get into my pack faster than my friend can get into his mutant 38. It's also considerably lighter than any of the other climbing or day packs for its size, which for me is a big plus.

    In summary, it's great and so is Facewest's delivery service. Go buy it!

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    Arcteryx Alpha FL 45 Review
    Verified Buyer

    Great pack, not only for climbing.After reading the pack's description I though on unpacking the first thing I noticed was the weight, it really is light compared to any other pack I owned, and the simplicity.Normally I'd sit down with a cup of coffee and explore compartments, gear loops and fiddle around with straps etc. This pack had undergone thorough inspection even before the kettle had boiled as there isn't much to see and do.

    The small frontpocket holds a slimmed down first aid kit and a pair of gloves, together with a few small utensils (keys, cash, lighter). I was surprised to find a little lanyard with plastic clip (I usually would attach a headtorch to avoid having to rummage through the whole pocket to find it). The main compartment really is just a Bag with roll top and drawstring cover with a plastic back plate integrated. The quality of fabric, seams and straps is flawless as would be expected from Arcteryx. Despite the lack of a nifty back support the pack immediately felt comfy with the usual munro daytrip equipment.

    I was worried about what it'd be like packed to only about half its max capacity, no one likes a floppy bag, but the simple compression strap over the top did the job perfectly well. Once the pack is on your shoulders you almost forget you have it. The shoulder straps, despite looking rather thin are the comfiest I ever had on any backpack, they adapt perfectly, no chafing or pressure points even with 5 layers.Slightly baffled (in a good way) I decided to take it for a trial trail up Schiehallion, steep ascent, loads of rockhopping, forecasted 60mph gales and complementary rain were deemed to be a worthy testing ground for the fl45. The backpack performed flawlessly, on the way up it wasn't any more or less sweaty than my old Deuter air comfort, but due to its weight, comfy straps and less stiff construction much less noticeable.

    The very basic hip belt wasn't utilised until the gales hit me at higher altitude from the left, enough to throw the pack around. With the belt attached, and shoulder straps tightened even ambitious boulder hopping couldn't throw the arcteryx off balance.The weight stays nicely distributed and, thanks to the close contact backplate stays glued to your back without ever being obtrusive. The roll-top single entry worked perfectly well for me and I found it less fiddly than zippers, which may snag your gear and it kept everything dry even after hours of being hammered with wind and driving rain and the generous overlap protected my gear whilst unpacking extra layers. The fact that there isn't a designated hydration pack exit or pouch didn't create an issue for me. A bladder can be put on top of the roll-top and covered with the drawstring outer top closure without making the pack top heavy and I find it a fair price to pay for absolute protection from the elements.

    All in all a versatile pack for allegedly being a highly specialised climbing pack. Light enough for a daytrip, big enough for an overnighter or even a multi day trip with the right gear. The Arcteryx fl45 truly shows that less can be so much more...

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    Arcteryx Alpha FL 45 Review
    Verified Buyer

    Very light and practical, expanding storage is a good thing, the cayenne orange looks very good and is visible from distance.

    Only concern is how it will handle as a check in bag when flying, might need a wrap. But being an Arcteryx product I expect it to resist.

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    Arcteryx Alpha FL 45 Review
    Verified Buyer

    Stripped down Alpine pack. I've been using the same 'hard as nails' Macpac 40 litre pack for winter walking and summer scrambling days out for nearly ten years. Whilst it is still going strong from a wear and tear point of view, it weighs 1kg more than the beautiful work of art that is the Arcteryx Alpha FL 45 pack, so I decided to buy this pack for a forthcoming alpine trip (including Mont Blanc ascent hopefully). There are many things Alpine mountaineers will do to pare their kit down to the minimum weight possible, but to shave a whole kilogram off your pack weight in one item is an incredible advert to the progress in materials/engineering/design in the last few years. Yes, there aren't all the pockets and other things you might think you need, but you'll quickly learn that you didn't need them (or Arcteryx would have included them) and more importantly, the things they have included work brilliantly - the ice axe attachment is brilliantly simple and effective. The bit that sits against your back will get sweaty as hell in the warm/wet UK, but in the cold/dry Alps your Goretex will breathe 100 times better and it shouldn't matter.

    As long as you understand what this pack is trying to be (the FL means 'Fast and Light') then you won't be disappointed - just remember fast, light things aren't going to be as user friendly as a slow, heavy thing - think Ferrari vs Volvo Estate. NB - I cannot guarantee this pack will attract you as many admiring glances from members of the other sex as a Ferrari, but it will probably attract some envious ones as it looks very slick in that very distinctive Arcteryx way.

    All in all it does exactly what it says on the tin - but make sure you read the tin properly and you will be a happy climber.

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    Arcteryx Alpha FL 45 Review
    Verified Buyer

    Very happy with this bit of kit, exactly as stated and will be getting plenty of use through the seasons around the UK. Fantastic build quality, bombproof material, stylish looks and totally functional.

    Looking forward to getting a few more items from Arcteryx.

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