Ryanair is a bit of a go-to when it comes to cheap flights, especially if you’re happy to sacrifice a larger suitcase and travel with just their free hand luggage allowance. While the airline did expand its luggage size last year, increasing it from 40 x 20 x 25cm to 40 x 30 x 20cm, it’s still pretty tight. Passengers need to make sure their bag can fit under the seat in front of them, as travelling with an oversized bag could mean paying an extra fee before boarding.

Luckily, there’s plenty of luggage designed specifically with Ryanair and other budget airlines in mind, made to squeeze in just enough for a short break without going even a centimetre over the allowance. One such option is the Rock Luggage Cabin Backpack. Measuring 40 x 25 x 20cm, it’s designed to slide neatly under the seat in front, making it ideal for airlines like Ryanair and easyJet.

While the bag is currently priced at £24 on the Dunelm website, we’ve spotted a clever deal via money-saving platform TopCashback. The site is currently offering new users a £15 welcome incentive when they spend £15 or more at participating retailers, including Dunelm.

Brand-new TopCashback members who are also new to Dunelm can pick up the backpack for just £8.58 after cashback, while those who are new to TopCashback but already shop at Dunelm can get it for £8.79 after cashback. Shoppers can sign up to TopCashback through its website.

According to Nottinghamshire Live, the backpack is made from high-density polyester, which is designed to be both strong and lightweight. While we think it’s a great option for travel, it would also work well as an everyday bag for commuting or even heading to the gym.

The backpack includes two internal zip pockets for smaller items, along with a slip-in pocket and an external zipped compartment. Compression straps help keep everything compact and secure while you’re on the move.

Available in black, green, navy or purple, the bag can also be attached to other luggage and features a wide-shell opening, making packing simple and fuss-free.

For those who need a bit more space, the Rock Backpack is also available in a medium size, measuring 45 x 36 x 20cm. Priced at £26 at full price, this larger carry-on would suit airlines with more generous baggage allowances.

Shoppers who’ve already bought the Rock Backpack from Dunelm have given it an impressive 4.9 out of five-star rating. One customer said: “Purchased 2 of these as dimensions fit in with easyJet’s underseat bags, which are free to take on board. Excellent bags, with 2 inner zip and 1 slide-in pockets and an outer zipped pocket too. I fitted more stuff in than I expected and it has 2 carry handles plus the ruckkie straps so very adaptable. Highly recommend.”

Another reviewer commented: “Bought this cabin bag to conform to Ryanair spec. It’s a lovely bag, very well made, loads of room inside, with separate compartments.”

A third shopper added: “This bag is a perfect size for carry-on luggage, fits perfectly under the seat in front of you. It’s compact, but with its individual compartments, it’s amazing what you can get in it. Definitely the best hand luggage bag I’ve bought, especially if you’re flying with Ryanair.”

One buyer did flag a potential issue, noting: “Used on two flights and strap has already come away from fabric, it’s not even a carrying strap!”.

Another glowing five-star review praised the bag’s versatility, saying: “A roomy backpack that carries everything you need for a few days or week away! Amazing space and very comfortable on the shoulders. Makes travelling with carry-on luggage only feel like a breeze!”.