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The Slipper Boot That's Rather Good at Everything
Right, so we've made a slipper boot that doesn't quite know whether it wants to stay indoors or venture into the great outdoors. Splendid news: it does both beautifully. Wrapped in plush faux fur and built with the kind of durability you'd expect from something named after a mountain, the Ossa High takes cosy to genuinely new heights without any of the fuss.
Why Choose Our Ossa High Slipper Boot
Rugged Outdoor Soles That Actually Grip: Our signature high-grip Gumtread outsoles are flexible, wonderfully long-lasting, and crafted from recycled rubber. They'll happily carry you from the sofa to the back garden and beyond without throwing a tantrum.
Fabulously Made From Second-Life Materials: The felt uppers are fashioned from recycled plastic, the foam insoles are made from plant-derived organic materials, and every component has had rather a good previous life. It's vegan-friendly too, which is rather marvellous.
Style Meets Comfort With Purpose: Wear it rolled down for everyday coziness or rolled up when you fancy a bit more snugness. The high-top design is utterly fetching in navy and grey, and the soft recycled PET felt is a genuinely lovely alternative to traditional wool.
Your Purchase Actually Does Something Good: Through our partnership with Empower AS, each pair recovers the equivalent of 80 plastic bottles worth of plastics from ocean shorelines and riverbanks. This harmful plastic pollution gets transformed into the rather gorgeous materials we use to make your boot. Brilliant bit of alchemy, really.
Product Details
Material: Recycled plastic felt uppers, plant-derived organic foam insoles, recycled rubber outsoles
Lining: Plush faux fur for maximum warmth
Design: Adjustable high-top with rolled or unrolled wear options
Colours: Navy and Grey
Footprint: Lighter than the average boot, thanks to sustainable materials
Order now and join the rather splendid club of people who refuse to compromise between comfort and conscience. These do tend to sell rather briskly.
SHIPPING + RETURNS
THE RATHER IMPORTANT BITS
This rather lovely piece ships directly from our brand partner - we work with independent brands who are absolutely brilliant and work frightfully hard to create beautiful things.
SHIPPING DESTINATIONS
Now, here's the thing - our wonderful brand partners ship to lots of different places, but not all of them can ship worldwide.
Some are brilliant at international shipping, others prefer to keep things closer to home.
At checkout, you'll see exactly where this particular brand can send your goodies.
We're terribly sorry, but shipping costs do vary rather wildly depending on where you are in the world. The exact figures pop up at checkout - no nasty surprises!
RETURNS
You have 14 days to return items.
Now, we absolutely adore our brand partners - they work incredibly hard and we do try to support them as much as we possibly can. So I'm rather afraid we have to pass the return postage costs back to you. Frightfully sorry about that!
🌍 PLEASE CHOOSE THOUGHTFULLY:
Our wonderful partners put their hearts into everything they make.
Ordering multiple sizes to try at home is rather hard on our planet and makes things jolly difficult for these brilliant independent creators.
When in doubt, do ask us first!
PAYMENT
We're frightfully modern and accept all the usual suspects:
Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay, and Shop Pay
SECURE AS HOUSES
Everything's properly encrypted and secure - your details are safer than the Crown Jewels!
All prices in lovely British pounds £ GBP, though international chaps will see converted prices.
Any payment pickle? We're here to help sort things out! Contact us
We Have Lots More Like This.........
Hello, we are Sostter....
Sostter began, as all good ideas do, with a lively conversation and a shared sense of frustration. Why had the world of independent design become so serious, so samey, so… beige? Where was the spark, the imagination, the sheer joy of discovering something that made you stop and stare?
We dreamt of a marketplace that celebrated difference — where curious minds could explore a world of independent brands, design-led makers, and thoughtful artisans. A space that felt exciting, human, and beautifully imperfect.
Today, Sostter brings together remarkable people and their creations — from London to Lausanne, Brooklyn to Berlin — uniting makers and discoverers through craftsmanship, creativity, and conscience. Every object tells a story, and every purchase supports an independent brand doing things differently.
This is just the beginning. But enough about us — step inside, explore our world, and see what catches your imagination.
Giving Back
We’re proud to support Sutton Night Watch, a grassroots UK charity making a real difference in the lives of those facing homelessness. Through regular donations of stock, supplies, and essentials, we back their mission to offer warmth, dignity, and practical help to anyone in need — right where it matters most.
Sell with us
Sostter partners with independent brands that intrigue, inspire, and bring something genuinely different to the world of fashion, design, and living.Join us!