Ergobag Cubo Set Subärkraft Review: a solid ergonomic school bag that’s not exactly light

I’ve been using this Ergobag Cubo Subärkraft set with my kid for the start of primary school, and it’s definitely not just a random backpack from the supermarket. It’s a full-on school starter kit: structured satchel, sports bag, filled pencil case, extra pencil pouch, plus the little Velcro patches to customize it. The first impression when you take it out of the box is pretty clear: this thing is built like a tank and looks ready to survive a few school years, not just one.

What struck me straight away is the weight and structure. At around 1.1 kg empty, it’s not a featherweight. You feel the frame and the solid base. But once it’s on the kid’s back, the straps and hip belt kind of balance that out. So it’s the classic trade‑off: lighter and flimsy, or heavier and more robust. Ergobag clearly chose the second option. For a first grader who’s small, you really notice it when you lift it, but less once it’s properly adjusted on the back.

Day to day, it behaves more like a small suitcase than a floppy backpack. There’s a hinged lid, a clear main compartment with a divider, and a box for notebooks. My kid finds it easy to open and close, which matters at school when the teacher is telling them to hurry up. After a few weeks of use, the structure hasn’t sagged, the base hasn’t warped, and the thing stands upright next to the desk without collapsing.

If you’re looking for a simple, cheap bag just to get through one year, this is probably overkill. But if you want something ergonomic with a real back system and a full set of accessories, this is more in that league. It’s not perfect, especially on the weight and price side, but you can feel where the money went: into structure, padding and organization, not into flashy gimmicks.

Let’s be clear: the Ergobag Cubo set is not in the budget category. You feel it as soon as you look at the price compared to a random kids’ backpack in a supermarket. The question is whether the extra cost is justified. After using it for a while, I’d say: it depends on what you’re looking for. If you only want something for one school year and don’t care much about ergonomics or longevity, you can definitely find cheaper options that will do the job.

Where the Cubo set earns its keep is in a few areas: ergonomics, durability, and the fact it’s a complete kit. You get the satchel, sports bag, filled pencil case, extra pouch and customization bits. That means less extra shopping and everything matches. If I add up what I’d pay for a decent separate bag, a sports bag, and a good filled pencil case, the gap narrows a bit. You still pay more for the ergonomic frame and brand, but it’s not just marketing fluff – the structure and padding are clearly superior to basic bags.

On the other hand, there are downsides for the price. It’s relatively heavy, and the design, while nice, isn’t super fancy or packed with high‑tech features. Also, because it’s a structured bag, it doesn’t grow in capacity as easily as a more flexible backpack. So if your child needs to carry lots of extra gear regularly, you might hit the size limit. You’re paying mostly for build quality, comfort and organization, not for sheer volume.

Overall, I’d rate the value as good but not mind‑blowing. If you have the budget and you care about your kid’s back and having a setup that lasts several years, it makes sense. If your budget is tight, you’re probably better off with a mid‑range bag that’s a bit less sophisticated but still decent. This Ergobag feels like a solid investment for families who want to buy once and be done, rather than replace a bag every year.

This specific version, Subärkraft – Purple, is pretty straightforward visually. It’s mainly purple with some pattern details, but it’s not overloaded with characters or massive prints. I actually like that: it’s neutral enough that my kid probably won’t be embarrassed by it in two years when their tastes change. It looks more like a serious school bag with a bit of fun, rather than a toy bag with unicorns everywhere.

The bag has a very boxy, upright shape. That’s deliberate: it keeps books and notebooks from bending and helps the thing stand up on the floor by itself. Compared to softer backpacks, this one looks more “school satchel” in the classic German style. Some kids love that “real school kid” look, others prefer a sporty backpack vibe. My kid was into the structured look, and especially liked that it doesn’t tip over all the time.

One thing Ergobag pushes is the customization with Velcro patches (Kletties). You get a small set in the box, and you can buy extra sets with other themes. They stick on the front and sometimes the sides. In practice, my kid enjoyed swapping them out at the start, then mostly forgot about them after a few weeks. It’s a nice option if your child changes interests (dinosaurs, space, etc.), but I wouldn’t buy the bag just for that feature. It’s more of a bonus.

The reflective elements are clearly visible. There are reflective strips all around the bag, so when a car light hits it, it lights up well. On dark mornings or winter afternoons, that’s reassuring. It’s not flashy in daylight, but in the dark it’s noticeable. From a design perspective, I’d say it’s a good balance: practical, visible, but not tacky. Overall, the design is practical first, pretty second. If you want glitter and crazy prints, this isn’t it. If you want something that looks neat and will age well over a few school years, it does the job.

This is the area where the Ergobag Cubo tries to justify its price: ergonomics. The carrying system is height‑adjustable, so you can set it up according to your child’s size. Adjusting it the first time takes a bit of patience – you need to loosen, move, and re‑tighten the back panel – but once you’ve done it, it doesn’t move by itself. We adjusted it once at the start of the year and haven’t had to touch it again, even though my kid has grown a bit.

The shoulder straps are wide and padded. They sit well on the shoulders and don’t cut into the neck. There’s also a chest strap that helps keep the straps from sliding off, which is useful when kids run around with the bag on (which they always do, no matter what you tell them). The big difference compared to a basic backpack is the padded hip fins. They wrap around the hips and take some of the load off the shoulders. When the bag is properly packed and the belt is tightened, you can actually feel that part of the weight sits on the hips instead of pulling the upper back backwards.

Now, the honesty part: the bag is not light. At 1.1 kg empty plus books, lunch box and pencil case, a small first grader is still carrying a decent load. The ergonomic system helps, but it doesn’t magically remove the weight. On days when there are extra sports clothes and art supplies inside, you can tell that my kid is working a bit harder going up stairs. The difference compared to a cheap bag is that they complain less about shoulder pain, but they still notice the overall weight when it’s fully loaded.

In daily use, my kid doesn’t try to take it off every five minutes, which is a good sign. They can put it on and take it off alone, clip the chest strap, and sometimes even remember to use the hip belt. For longer walks to school, I insist on using both chest and hip belts, and the posture looks correct: bag close to the back, no big gap at the top. So in terms of comfort and back support, it does what it promises, as long as you take the time to adjust it properly and don’t overload it like a moving van.

The bag is made from synthetic material, and Ergobag says it uses around 27.7 recycled PET bottles for the fabric. I can’t verify the exact number, but the fabric does feel thick and tough, not that thin nylon that tears if it brushes a wall. After several weeks of daily use – being dragged on the floor, shoved under desks, and tossed into the car – there are no tears, and the corners aren’t frayed. So from a durability standpoint, it feels solid.

The hard plastic base is one of the big pluses. It covers the entire bottom and goes up a bit on the sides. That means when the bag sits in a puddle or on a wet playground, water doesn’t soak straight through. I’ve had cheaper bags in the past where the bottom became damp and the notebooks curled – that hasn’t happened here. You can also wipe the base easily with a sponge. The only downside is that this base adds to the weight and makes the bag stiffer, but that’s the trade‑off for protection.

The zippers and buckles feel reliable. The main flap uses a robust clip that my kid can open and close without help. The zippers on the front and side pockets slide smoothly so far, no snagging. The straps and handle are made of webbing that seems properly stitched. I checked the seams around the shoulders and hips because that’s where things usually fail; nothing is coming loose yet, even with the bag often being overloaded with art folders and random toys.

On the sustainability/cleaning side, the synthetic material is easy to wipe. A damp cloth removes most marks. Pen and marker stains obviously don’t vanish, but dust and mud do. The recycled PET aspect is a nice bonus if you care about that, but for me the main thing is that it feels like it’ll last more than one kid if needed. The compromise is clear: tough materials and a structured frame mean a bit more weight and a less “soft” feel, but it feels like a bag you don’t have to baby.

After several weeks of regular school use (five days a week, plus the occasional weekend outing), the Ergobag Cubo Subärkraft still looks almost new. No loose threads, no broken zippers, and the shape is unchanged. The hard base hasn’t cracked or warped, even though my kid treats it like a stool half the time and sits on it while waiting outside. That alone tells me it’s not going to fall apart after one term.

The outer fabric holds up well against scratches and dirt. My kid drags it along walls, across the playground, and through the bus. The purple color hasn’t faded, and the corners are intact. When there’s mud or dust, a quick wipe with a damp cloth is enough to make it look decent again. I haven’t had any rainstorms strong enough to fully test waterproofing, but in light rain and wet ground, nothing inside has gotten wet thanks to the base and flap.

Inside, the lining and dividers are still firm. Some cheaper bags start to sag inside, and the dividers collapse under the weight of books. Here, everything stays in place. The pencil case and sports bag also hold up fine – zippers intact, no holes in the fabric. Considering the relatively high price, that’s what I expect, and so far it delivers. I can realistically see this bag lasting through the full primary cycle if the kid doesn’t suddenly decide they hate purple.

The only small concern long term might be the Velcro areas for the patches. Velcro always tends to collect lint and can get less grippy after a few years. But that’s cosmetic, not structural. The essential parts – straps, base, zippers, fabric – feel robust. So in terms of durability, I’d say it justifies the investment better than the many cheaper options that look tired after one year. You’re basically paying for something that can survive several school years, or be passed down to a younger sibling.

The Ergobag Cubo Subärkraft is sold as a multi-piece set, and that’s important because you don’t have to buy much else on top. In my case, the set included: the main ergonomic school bag (28 x 40 x 25 cm), a sports bag, a filled pencil case, an extra empty pencil pouch, and a small set of Velcro patches (the “Kletties”). Sometimes they talk about 5‑piece or 6‑piece sets depending on how they count the filled pencil case, but in practice you’ve got everything a first grader needs to start.

The main bag is more like a hard‑sided school satchel than a soft backpack. There’s a big front flap with a clip, side pockets, a front pocket, and the hard plastic bottom. Inside, you get a structured main compartment, a notebook box, and a flexible divider. The sports bag is pretty basic but matches the design and can be clipped to the main bag if you want. Personally, I prefer my kid to carry it separately so the weight doesn’t all end up on one point.

The filled pencil case is actually handy: pencils, felt pens, ruler, eraser – all already in place. The quality of the pens is okay; nothing to rave about, but it saves you that annoying back‑to‑school shopping run for the basics. The extra pencil pouch is useful for felt pens or scissors and glue, so the main case doesn’t become chaos after two weeks. My kid quickly adopted a system: pencil case stays mostly at school, pouch travels more.

Overall, as a starter package, it’s pretty solid. You pay more up front, but you’re not chasing extra stuff in three different stores. The downside is you don’t really get to pick and mix each item. If you already have a good sports bag or pencil case, you’re basically paying for duplicates. So the value is best if you’re starting from zero for a first school year and want to tick the whole list in one go.

On a daily basis, the Ergobag Cubo is very practical for keeping school stuff organized. The main compartment is clearly divided: there’s a notebook box at the back where the big folders and notebooks go, then a flexible divider for books, and space in front for the lunch box and pencil case. My kid quickly got used to a simple rule: heavy stuff at the back, lighter stuff at the front. That helps with balance and also means the sandwich doesn’t get crushed between books.

The front pocket is handy for small items: keys, a small snack, or a pack of tissues. The side pockets are good for water bottles; they hold them firmly enough that they don’t fall out every time the bag tips over. I tested with a standard 0.5 L bottle and it fits fine. If the bottle leaks a little, at least it’s not directly over the books. The hinged lid is easy to open even when the bag is sitting on the floor, which is practical in class when space is tight.

In terms of visibility and safety, the reflective strips do their job. When we walk in the early morning and a car passes by, you can clearly see the reflections. It’s not as bright as a bag that’s half neon yellow, but combined with a reflective vest it’s more than enough. The rigid base also proves useful: the bag stands upright next to the desk or in the hallway, instead of constantly falling over and spilling everything out.

From a parent’s point of view, the biggest benefit is that my kid actually manages to keep the inside relatively tidy. With other, more open backpacks, everything ends up in a pile at the bottom. Here, the structure forces some order. The downside is that the rigid shape means you can’t just squeeze in a huge extra folder or jacket – when it’s full, it’s full. So in terms of effectiveness, it’s strong on organization and daily use, a bit less flexible when you want to overpack it.