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Osprey Womens Sirrus 24 Ruska Purple

Osprey Womens Sirrus 24 Ruska Purple

£80.00 £110.00
27% off

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Other colours available:
Osprey Womens Sirrus 24 Summit Blue
Osprey Womens Sirrus 24 Black
Osprey Womens Sirrus 24 Ruska Purple

The women's specific Sirrus 24 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!

This product is out of stock

Season : 2020W C OFFER

Code : 542800PUR.Std

Weight : 0KG

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What is the Sirrus 24

The Sirrus 24 is all about breathable comfort for day hiking in the hills with enough room for spare clothing, food and the essential kit. It is the perfect for pack for any kind of 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 Sirrus 24 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 are the features?

Designed specifically to fit the female form the unique suspended mesh located on the shoulders, backpanel, lumbar and hipbelt contour and adapt to a wide variety of body shapes and sizes, basically creating a custom fit. Overall the women’s pack shape is narrower and deeper which allows for a greater freedom of movement and increases stability by lowering the position of the load to better suit a woman's natural centre of gravity.  The shoulder harness is designed with different curves to create an anatomical fit for a woman's neck, shoulders and chest. Women's hips are conically shaped with a larger difference between the waist and hip measurements, so the hipbelt is shaped and angled to accommodate this difference, creating comfortable load transfer and increased support.

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.

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 Sirrus 24 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 inside, or outside the side pockets. Under the pocket they compress the pack and not the pocket, and over the pocket they secure the contents of the pocket and compress the pack. Simply thread the straps in the manner that suits your needs.

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.

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. The whole system is made up of 4 main components:

1. AIRSPEED SUSPENSION – LightWire alloy frame creates low profile air space, optimising pack balance and ventilation. Effectively transfers weight from shoulders to the hips.

2. AIRSPEED SUSPENSION BACKPANEL - 3D-tensioned breathable mesh backpanel ensures supportive fit and enhances airflow and ventilation.

3. SPACERMESH SHOULDER HARNESS - Sewn-in Spacermesh made up of mesh-covered ventilated die-cut foam to enhance all that ventilation and comfort. The shoulder harness is designed with multiple torso size options and features Velcro adjustability.

4. SPACERMESH SEWN-IN HIPBELT – Featuring zippered stretch mesh hipbelt pockets and ErgoPull (forward pull straps) hipbelt closure. The hipbelt connects directly to backpanel mesh to eliminate seams creating a smooth and comfortable lumbar to hipbelt body wrap.

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 Osprey Sirrus packs are one-size only, which keeps thigs simple, but they do have an adjustable 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 more advice on pack fitting have a look at our video below.

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.


The Sirrus 24 features the perfect amount of space for those who are heading into the hills for the day with all the essential kit. This pack also makes the perfect travel companion as it will go as carry-on luggage for most airlines.

  • Adjustable AirSpeed ventilated trampoline suspended mesh backpanel
  • Adjustable torso length
  • Designed for Women
  • Integrated & detachable raincover
  • Internal hydration sleeve
  • Internal key attachment clip
  • 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
Care & Advice

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

Capacity (WS/WM) - 24 Litres

Weight (WS/WM) – 1.16kg

Load Range – 7-13kg

Dimensions (cm’s) – 49h x 30w x 30d


Sizing Information

Back length (WS/WM) – 41 - 51cm

  • 5

    Reviewed by Jill,  On 31/07/2018 12:27:47

    Bought after reading reviews. Very good product - comfortable and functional - early days but quality seems excellent
    YES Jill would recommend this item
  • 5

    Reviewed by Sarah,  On 05/05/2017 17:55:17

    I love everything about this bag as a summer/good weather rucksack. The length of the back of the bag can be extended and I found it is very comfortable to wear.
    YES Sarah would recommend this item
  • 5

    Reviewed by jelena,  On 15/06/2018 16:13:59

    The really useful feature of this backpacks is the adjustable back length. I have a long torso and womens backpacks often do not fit me but this one did as I could simply adjust (shorten/lengthen) the back of the rucksack. It has a wide hip belt which is handy when carrying fully loaded bag. There are a number of useful outside pockets and wet clothes compartment plus a rain cover and, importantly, the main compartment is not divided so you have plenty of volume for a daypack.
    YES jelena would recommend this item
  • 5

    Reviewed by Gay,  On 26/06/2017 11:15:11

    The womens rucksack is lightweight, well constructed and very adjustable making it possible to achieve a much better fit than many on the market. After 77 miles it was still comfortable.
    YES Gay would recommend this item
  • 5

    Reviewed by Gill,  On 27/09/2017 18:58:03

    Brilliant design. Loads of compartments, great weight distribution so no pressure points and fantastic finishing.
    YES Gill would recommend this item
  • 5

    Reviewed by Fiona,  On 05/03/2018 20:06:22

    Very well made. Keep sweat off your back effectively. Very adjustable so I imagine would fit a lot of people. Im a size 12 and it fits my hips very well and I can reach the hip belt pockets from the front. I can also get a water bottle from the side pockets and put it back without taking the pack off which is really handy. I stuffed my pack full of heavy books and put it on - as soon as I did up the hip belt the weight almost totally vanished from my shoulders. I get upper back pain but not with this pack :) Dont even notice I have it on.
    YES Fiona would recommend this item
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    Excellent customer service. Really detailed easy to understand product descriptions on the Trekitt website, and gear reviews on the Trekitt YouTube channel made it so easy to choose the right backpack for me.
    Emily - May 2020
    Amazing service! Very helpful in regards sizing and what most matched my needs, despite this being done over the internet. YouTube videos of products being examined are very useful also. Would definitely use again, very fast and efficient delivery. Brilliant! Highly recommended!
    David R - April 2020
    Highly recommend. I usually go to the shop in Hereford as staff are alwasy very helpful and knowledgeable. So this was the first time I have purchased online and the service was just as good as the shop.
    Grizzy - April 2020


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