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The Stratos 34 daypack is all about ventilation and comfort, featuring an AirSpeed trampoline mesh back panel and Spacermesh shoulder straps and hip belt. Carrying this comfortable pack will literally be a breeze!
The Stratos 34 daypack is all about ventilation and comfort, featuring an AirSpeed trampoline mesh back panel and Spacermesh shoulder straps and hip belt. Carrying this comfortable pack will literally be a breeze!

Osprey Stratos 34 Black

£126.00  £140.00  10% off
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Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on the Undetermined

Osprey Stratos 34 Black Information

Season : 2021S R

Brand : Osprey

Code : 5422BLKBLK

What is the Stratos 34

The Stratos 34 is all about breathable comfort for long days out in the hills with enough room for your essential kit. It is the perfect for pack for any kind of hill walking or travel and thanks to the fully adjustable AirSpeed ventilated back system; carrying this pack will literally, be a breeze.

What is it made from?

The Osprey Stratos 34 is definitely built to last and uses tough, durable nylon fabrics to ensure it can soak up the bumps and scrapes of an active life. The main bulk of the bag is made from a super tough 210D Nylon Crosshatch with a durable water-repellent finish to keep your kit dry during light rain (a rain-cover is included for heavy downpours). This fabric is reassuringly thick, yet light enough that you barely realise you're wearing the pack, even when fully laden. Heavier and more durable 420D fabric is used on high wear areas such as the base and sides of the pack.

What is the back-system?

This is where the magic happens! Osprey have taken inspiration from their brilliant AntiGravity technology to create a seamless construction across the back-panel and hip-belt using highly breathable suspended mesh to create the AirSpeed Ventilated Trampoline Suspended back system.

This seamless and continuous construction method transfers weight superbly and is incredibly comfortable and lightweight. The whole pack is suspended away from the back-panel to produce an air gap that allows superb ventilation even on the hottest days. It won’t stop you sweating, but it will make you feel more comfortable.

The hip belt is reinforced with a die-cut foam to produce stability and control whilst allowing that ventilation theme to continue. It’s not a massively padded hip belt, as the load range is 7-13kg, so you won’t be carrying excessive weight, but it does an excellent job of transferring the loads to your hips and away from your shoulders. The shoulder straps also feature die-cut foam for comfort, support and ventilation and flex beautifully around your body to increase comfort. You also get an adjustable sternum strap (with built-in whistle) to help spread the load.

Available in two different back lengths:

Small/Medium = 41-51cm

Medium/Large = 48-58cm

Each size of the AirSpeed back system is adjustable to ensure the perfect fit using a simple, yet highly effective, Velcro pad on the shoulder harness that can be easily set to various heights depending on the user. Please remember that your torso length and not your height will determine the back length. For example, I’m 191cm tall, yet only have a 47cm torso length, so my Osprey packs are all size Small/Medium. For more advice on pack fitting have a look at our video here.

Underpinning all that comfortable, breathable AirSpeed mesh is a flexible wire frame to transfer weight to the hips and to provide stability. The frame allows a degree of flex to the pack, so when you’re striding out, your shoulders can move independently of your hips.

What are the features?

It isn't just the comfort and support that we love about the Stratos 34, we also love the attention to detail and the number of clever, and unique, features.

The main entry point is through a large zipped top entrance to give unhindered access to the pack’s contents. You can almost open up the pack like a suitcase so you can easily dig out items from the bottom of the pack without emptying the rest of your kit into the mud. The main compartment can also be split in two using the built-in divider and toggles. This creates a separate base compartment for wet or dirty kit, or to simply organise your pack more effectively. The base compartment can be accessed via a large zipped entrance at the bottom of the pack.

Inside the main compartment is a hydration sleeve with a little clip to stop the bladder from drooping down to the bottom of the sleeve. This is the perfect place to pop your Osprey Hydraulics reservoir.

Osprey equip the Stratos 34 with a single walking axe loop and the unique “Stow-on-the-go” trekking pole attachment system is a revelation. This allows you to safely stash your trekking poles away when they are no longer required without having to remove the pack or pester a mate to do it for you.

Two side “InsideOut” compression straps pull the weight closer to your back, increasing comfort and carrying efficiency; they also stop gear from rolling about in a half full pack. So called because they can either be used under, or over the side pockets. Inside the pocket they compress the pack and not the pocket, and outside the pocket they secure the contents of the pocket and compress the pack. Simply thread the straps in the manner that suits your needs. Two further straps at base of the pack can be used for storing sleep mats or extra clothing; or can be completely removed if you just don’t need them.

Starting from the top, pockets wise, you get a zipped mesh pocket with an internal key clip, this is perfect for stuff you want to get at quickly or keep separated for safety and security.

The two mesh side pockets will easily take an insulating layer or a 1L bottle and feature a tougher fabric at the base to stop the mesh from being damaged by abrasion. There are two 3D zipped pockets on the hip belt that you can still gain access to even when the hip-belt is done up tight. On the front of the pack is a large, expandable, zipped pocket that’s perfect for wet, grotty gear or clothing that you need to access quickly, like waterproof jacket or trousers.

Right down at the bottom of the pack is a small zipped pocket containing the rain-cover. This cover is tethered to stop it flying away in the wind, or it can be completely removed to shed a bit of weight in good weather. The cover fits snugly over the front of the pack and is held firm with an elastic drawcord.


The Stratos 34 features the perfect amount of space for those who are heading into the hills for the day with all the essential kit. If your kit is really lightweight and minimal it could be used for overnight camping trips or travel duties. It is incredibly comfortable to carry and allows massive amounts of breathability thanks to that brilliant AirSpeed back system.

  • Adjustable AirSpeed ventilated trampoline suspended mesh backpanel
  • Adjustable torso length
  • Integrated & detachable raincover
  • Internal hydration sleeve
  • Internal key attachment clip
  • Removable sleeping pad straps
  • Side compression straps
  • Single ice axe loop
  • Sternum strap with emergency whistle
  • Stow-on-the-Go trekking pole attachment
  • Twin zippered hip belt pockets
  • Vertical centred zippered pocket
  • Zippered panel access

Getting the correct fit for your rucksack is as important as getting the fit right for your boots. A badly fitting pack can inflict misery and discomfort and completely ruin your adventure. This guide is designed to help you get the best fit and comfort from your chosen pack so that carrying all your kit becomes a pleasure and not a chore.


If the pack has an adjustable back length, adjust this to your correct level. Your back length is not related to your height but your torso length. Many packs, and specifically the bigger and more technical packs are available in different back lengths or feature adjustable back systems. Contrary to popular belief, your torso length and not your overall height is the key to getting a well fitted pack. Tall people don’t necessarily have long torsos, just as shorter people don’t always have a short torso length.

Your torso length can be found by measuring from your C7 vertebra (the bony protrusion at the back of your neck when looking down) to the height of your iliac crest (top of your hip bones, where you put your hands on your hips). This measurement will give you an idea of which pack back length to choose.

Once you've got the back length sorted, either by selecting the correct size pack or adjusting the back system, you can begin to follow these simple steps to help achieve a comfortable carry.


Before you start fitting the pack, loosen off all the straps as this will make it easier to get the correct tension later.


Fasten the backpack hipbelt, the general position is the same as where you’d put your ‘hands on hips’ This area is called the pelvic girdle, and what you can feel when you rest your hand on the area is the bony protuberance, the iliac crest. The iliac crest can support the weight from a pack comfortably, and for sustained periods. The padded section of the hipbelt should encompass this and fit securely.

Tighten the straps so the hipbelt feels secure and held firmly around your body. Ensure that the lumbar pad is centered to your lower back to give you maximum support. Remember that your hips carry most of the weight of the pack, so this should be firm but comfortable.


Next, adjust the shoulder straps, pull them until they start to become snug, but ensure that they are not too tight as to lift the pack off your hips. Remember tightening them will stabilise the pack but will increase pressure over the shoulders. If the back length of the pack is correct the shoulder straps will be flush to your shoulders whilst the hipbelt sits in place comfortably. The point where the shoulder straps attach to the main body of the pack should be roughly half way down your shoulder blades; this ensures  that the shoulder straps rolls evenly over the top of your shoulders to distribute the weight correctly.


Fasten the chest strap and pull until taut but not tight, the elastic section should not be extended. This helps keep the shoulder straps from catching in your shoulder joints and keeps the stability of the pack when moving over rough ground.


Top tensioner straps link the shoulder straps to the top of the pack. When tightened, their main function is to stabilise the top part of the pack. The optimum angle for these straps in 45º, but they will stabilise the load even when horizontal or at a more obtuse angle. Tighten them until you feel the top part of the pack rest against your pack, over tightening them will create excessive pressure on the front of your shoulders.


Side tension straps are linked to the hipbelt. By tightening these straps you can stabilise the load but reduce the hipbelt flexibility. Where balance is critical tightening them can help you feel more secure. However, if you are striding out over easy terrain it’s better to loosen these straps to allow full hip flexibility.


Side compression straps come next, pulling these tight does two things: firstly, it stabilises the load, secondly it can lift the lower part of the pack, repositioning the load closer to your back.


Following these steps should give you a comfortable but secure fit on your pack. Sometimes adjustments will need to be made on the go depending on the terrain or the load you are carrying. The perfect fit is very much a personal preference so experiment with different tensions on the pack to find what suits you best.

Technical Information

Fabrics: 210D Nylon Crosshatch / 420HD Nylon Packcloth

Size (S/M) - 32 Litres
Size (M/L) - 34 Litres

Weight (S/M) - 1.33kg
Weight (M/L) - 1.39kg

Sizing Information

Dimensions: 62 (l) x 30 (w) x 31 (d)

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4.9 As rated by 8 Customers

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  • Osprey Stratos 34 Black Review by Alan,  On 09/08/2017 10:12:29

    Excellent rucksack, best I have owned. So many well designed features and feels light too.
  • Osprey Stratos 34 Black Review by Alan,  On 09/08/2017 10:15:19

    Very well designed rucksack - best I have owned. Feels comfortable and light too.
  • Osprey Stratos 34 Black Review by Chris,  On 20/10/2017 17:23:01

    After one day-long expedition this has already become an invaluable piece of kit. So many brilliant features and the best part is when fully loaded, if you use the straps properly, youll hardly notice it is there. I had it on the go for 10 HOURS and found quick progress easy. Really excellent.
  • Osprey Stratos 34 Black Review by Boguslaw Zuk ,  On 10/02/2018 22:31:31

    This is not my 1st osprey rucksack and not last but its really good and worth every penny. Great product. 1st class shop
  • Osprey Stratos 34 Black Review by Boguslaw ,  On 11/02/2018 08:59:10

    Great backpack. Worth every penny.
  • Osprey Stratos 34 Black Review by Mark Wilson ,  On 20/02/2018 21:08:07

    I have always known that Osprey bags are the best. I already have a zealot for use while cycling. All I needed was the right place to buy a 30 plus litre bag to replace my old rucksack and the place I chose was trekitt, turned out to be an excellent choice , great delivery great price, a perfect match for the Osprey Stratos 34 that I chose. Looking forward to my first trip once the weather perks up.
  • Osprey Stratos 34 Black Review by Chris ,  On 20/05/2018 22:12:29

    Very comfortable even with full load, quite a revelation after my 10 year old very basic bag. Bought after trying my friend’s who also rated it highly.
  • Osprey Stratos 34 Black Review by Ian,  On 22/06/2018 23:01:05

    Its a bit heavier that Im used to probably due to weight of a frame but it does sit comfortably on the shoulders and back much better than other makes ever did. Only niggle I have is the hydo hole where the drink tube goes through is pretty tight so its a struggle but do-able to get a Camelbak mouthpiece through. Bearing in mind its an Osprey, if its the capacity you need, its well worth the purchase.
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