Stormur vs. Ylur: Which Simba slipper is right for you?
Choosing between the two flagship Simba slippers often comes down to your personal temperature preference and how much you value a secure, adjustable fit.
While both feature the same 9-zone reflexology technology and durable indoor-outdoor soles, they cater to different lifestyle needs.
Choose the Simba Stormur (the felted clog) if:
- You prioritise warmth: Crafted with a premium Merino wool upper, the Stormur is the ultimate winter slipper. It’s designed to trap heat while remaining breathable, making it perfect for those with chilly floorboards.
- You love the clog aesthetic: If you’re a fan of the Birkenstock Boston, this is the model for you. It offers a closed-toe look that feels more like a cosy shoe than a typical house slipper.
- You prefer a snug feel: The felted wool naturally hugs the foot more closely, providing a sense of security and warmth that wraps around your toes.
- Price is a factor: At under £70, the Stormur is the most entry-level way to buy Simba slippers and experience their massage technology.
Choose the Simba Ylur (the sandal style) if:
- You have high arches or wide feet: The Ylur features a double-strap design with adjustable buckles. This is a game-changer for fit since it allows you to tighten or loosen the slipper to ensure your foot is perfectly aligned with the gel pressure points.
- You tend to overheat: If you find standard slippers too sweaty, the open-toe sandal design of the Ylur provides maximum airflow. It’s a great year-round option that transitions perfectly into the warmer summer months.
- You want a commuter hybrid: Because of its leather straps and sturdy build, the Ylur looks very much like a high-end outdoor sandal. It’s the model most likely to be mistaken for a real shoe during a quick trip to the shops or a school run.
- You want more colour variety: The Ylur often comes in a slightly broader range of nature-inspired hues compared to the grey-heavy Stormur palette.
Regardless of which model you choose, the most consistent feedback is that they run small.
Because the reflexology gel points need to hit specific areas of your sole to be effective, having a slipper that is too short can be uncomfortable.
We strongly recommend sizing up by one full size from your usual shoe size to ensure the most comfortable experience.
Comfort & support of the Simba slippers
The defining feature of both the Stormur and Ylur models - and the reason behind the glowing Simba slippers reviews - is the 9-zone reflexology footbed.
This isn't just a marketing gimmick; it's a carefully engineered system designed to mimic the benefits of a professional foot massage.
The science of the 9 zones
Reflexology is based on the idea that specific points on the feet correspond to different parts of the body.
Simba Sleep slippers integrate nine gel-filled stimulating support zones into the leather insole.
These points are strategically placed under the heel, arch, and the ball of the foot.
When you first slide them on, the sensation is unique - you can definitely feel the nodules under your feet. However, as you walk, these gel pockets compress and rebound, creating a gentle, rhythmic massage.
Our tester found that this significantly reduced tension after long periods of standing, helping to improve circulation and reduce that heavy foot feeling at the end of the day.
Triple-layer construction
The Simba slippers' comfort isn't just about the gel points.
They also feature a sophisticated three-layer sole:
- Cushioned leather insole: The soft top layer that houses the gel points. It’s breathable and prevents that sweaty feeling often found in synthetic linings.
- Cork-effect midsole: This layer provides the structure. It’s lightweight but firm enough to align with the natural shape of your foot, offering real orthopaedic-style support.
- Rubber outsole: This provides the grip. It’s thick enough to protect your feet from cold floors and durable enough for light outdoor use.
The three-in-one makes the Simba slippers the real deal.
Style and materials of the Simba slippers
Simba hasn't cut corners on the materials, opting for a premium Scandi-cool look that feels more like high-end footwear than a standard slipper.
The Simba Stormur slippers feature a felted Merino wool upper.
This material is a natural wonder - it’s incredibly soft, naturally water-repellent, and offers excellent temperature regulation. It keeps your feet warm in the winter but remains breathable enough for spring.
The Ylur utilises smooth calf leather for its straps. It’s durable and develops a lovely patina over time.
The leather used in the insoles of both models is soft against the skin, though some users might find the Merino wool slightly textural against bare feet initially. We recommend pairing them with a good pair of woolly socks for the ultimate cosy experience.
Both models are available in earthy tones like grey, beige, and green.
They look effortlessly stylish and wouldn't look out of place if you wore them for a quick coffee dash in town.
How do the Simba slippers compare to Birkenstock?
It’s the comparison everyone wants to make.
The Stormur is a clear alternative to the Birkenstock Boston, while the Ylur targets the Birkenstock Arizona crowd.
The main differences are:
- Break-in period: Birkenstocks are notorious for their hard cork footbed that can take weeks to break in. The Simba slippers offer instant comfort. There is no stiff phase, and they feel plush from the very first step.
- The feel: Birkenstocks provide firm, rigid support. Simba provides cushioned support. If you find Birks too hard on your heels, Simba's gel points provide a much-needed give.
- Acoustics: One of our testers noted that the Simba slippers are much quieter. They don't have that heavy clop or the flip-flop slap sound on hard floors, thanks to the shock-absorbing rubber and cork-effect layers.
- Price: At under £70, the Simba Stormur is significantly more affordable than the leather Birkenstock Boston, which often retails for over £100.
Unboxing, packaging and delivery of the Simba slippers
Simba treats their accessories with the same care as their mattresses.
The slippers arrive in a premium, 100% recyclable cardboard box.
There is zero plastic packaging in sight, which is a big win for eco-conscious shoppers.
Inside the box, you’ll find a detailed diagramme of the 9-zone footbed, explaining which points target which areas of your body.
It’s an impressive unboxing experience that makes them feel like a great gift option.
Where can I buy Simba slippers?
You can find them directly on the Simba Sleep website [1], and occasionally at retailers like Costco or John Lewis.
Delivery is free to most UK postcodes, and if you order before 1pm, you can usually expect them on your doorstep the very next working day.
Care and cleaning
Given the natural materials (Merino wool and leather), you cannot put these in the washing machine.
Doing so would likely ruin the cork-effect midsole and the integrity of the gel points.
- For the Wwol (Stormur): Use a soft brush to remove surface dust. For stains, rub gently with a mild soap solution and a damp cloth, then let them dry naturally away from direct heat.
- For the leather (Ylur): A standard leather cleaner or a damp cloth works wonders.
- The sole: The rubber outsole is very easy to wipe clean after you've been outside, ensuring you don't track mud back onto your carpets.
By taking good care of your slippers, they’ll last you a long time.
Should you buy a pair of Simba slippers?
The Simba Slipper range is an absolute standout in the world of recovery footwear.
They have managed to blend the orthopaedic benefits of reflexology with a high-fashion, contemporary aesthetic.
While the Stormur is our top pick for winter lounging due to its cozy Merino wool wrap, the Ylur is the superior choice for those who need more adjustability for high arches or wide feet.
At a Simba slippers price point of £69 to £89, they are a premium investment, but if you value foot health and want a slipper that will actually last more than one season, these are worth every penny.
Your feet (and your lower back) will thank you.
Frequently asked questions
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Do Simba slippers run true to size?
Most Simba slippers reviews and the brand itself suggest that they tend to run slightly small.
Because of the structured reflexology footbed, having a pair that is too short can mean the massage points don't align correctly with your feet.
We recommend sizing up by one full size for the best fit, especially if you plan on wearing them with thick socks.
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Are Simba slippers machine washable?
No.
Due to the premium natural materials like Merino wool, calf leather, and the specialized gel-filled points, you should never put your Simba sleep slippers in the washing machine.
To clean them, simply use a damp cloth with a mild soap solution and let them dry naturally.
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Can I actually wear the Simba slippers outside?
Yes! One of the biggest selling points is the durable, non-slip rubber outsole.
While they are designed primarily for indoor comfort, they are perfectly sturdy enough for light outdoor use - think nipping to the garden, taking out the bins, or a quick dash to the local shop.
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Do the Simba slippers come with a warranty?
While Simba is famous for its 10-year mattress guarantee, their accessories - including the Simba Stormur slippers - typically come with a 1-year guarantee against manufacturing defects.
This gives you peace of mind that your investment is protected.
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What is the return policy on Simba slippers?
If you purchase directly from Simba, you usually have a 14 to 30-day return window (depending on the current seasonal policy) for accessory items, provided they are in a resalable condition and in their original packaging.
Unlike their mattresses, there is no 100-night trial for footwear, so make sure the fit feels right as soon as they arrive!
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References
Alternatively, message us directly via the Contact Us page.