A swimsuit, swimming goggles, a cap, and flip-flops—some believe that’s all you need to go swimming. And it’s true, as it’s the basics to get started. But those of us who have been training for a while know that in the end, we end up carrying more things: hygiene products, towels, change of clothes, and above all, training equipment. That’s why having a good backpack to carry all this is so important.
In my case, sports backpacks or bags didn’t last long: water and daily wear and tear would end up wearing them out. So, after seeing it so much at the pool and my teammates recommending it, I ended up getting the Arena Spiky III 45-liter, one of my essentials for swimming. From day one, I understood why it’s one of the favorite backpacks among swimmers: it has good capacity, allows easy organization, and prevents wet items from mixing with dry ones.
34% discount, save 24.51 euros.
Arena Spiky III: spacious and very practical
In e-commerce, where it has a high average rating (4.6 stars out of 5), others also share my enthusiasm for this backpack. The first thing you notice is its capacity, as it allows you to carry everything you need, and more, to the pool. Although it depends a lot on the training session, I have managed to fit paddles, fins, a snorkel tube, pull kick, and pullbuoy, as well as the toiletry bag, clothes, microfiber towels, and a water bottle. Yes, all that without worrying about space.
But it’s no use having a spacious backpack if it can’t keep up with daily use. Whether due to weight, pushing its capacity, or carrying it from one place to another, backpacks end up suffering and, over time, breaking, which is quite common in these environments. That’s why I value this Arena model so much: besides being spacious, it is very durable.
Another thing to highlight is that it has details I find very practical: the carabiners located on the sides. What is their function in this type of backpack? They are designed to hang the swimming goggles case or the waterproof headphones case, so you can access them quickly.
Several compartments for better organization
In my opinion, what makes the difference compared to other models is its main pocket: its U-shaped design allows you to see inside without blindly rummaging or emptying the backpack. This is also helped by good distribution. And the best thing about this backpack is its multiple compartments, something I consider key when you have to carry so many things to the pool.
Besides the main opening, it has two pockets on the sides, another on the front area, and small mesh compartments to hold water bottles. This way, you can organize your swimming backpack as you prefer. In my case, I usually leave smaller items like swimming caps, flip-flops, wallet, or some hygiene products in these more accessible areas.
34% discount, save 24.51 euros.
Water-resistant
At a pool, it would be unusual for the floor not to be wet. That’s why this backpack is made to prevent its contents from getting wet: besides being waterproof, it has a reinforced base so that when you set it down, your things stay intact.
The most practical feature, without a doubt, is that it has a separate compartment to separate wet from dry: you won’t have to put the towel and swimsuit in a separate bag or, in the worst case, mix wet items with your change of clothes. Also, to let the interior breathe and avoid unpleasant odors, this backpack incorporates mesh in part of its fabric to improve ventilation.
And not just for swimming
Backpacks are quite versatile. Although bought for a specific use, they end up being used in different contexts. Besides taking it to the pool, I can attest that this Arena backpack is also a great ally when going on a trip: its padded straps and breathable back ensure maximum comfort even when carrying heavy loads.
34% discount, save 24.51 euros.
Frequently asked questions about this Arena swimming backpack
What materials is it made of?
90% nylon and 10% polyester.
Are there versions with lower capacity?
Yes, within the Arena Spiky III range, there is another 35-liter option.
Can you choose between several colors?
There are three colors available at the moment.
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*All purchase prices included in this article are updated as of May 18, 2026.
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