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The Sort of Red Dress That Causes a Bit of a Stir
Rather marvellous things happen when you slip into Cosmic Crimson. We're not entirely sure of the science involved, but history suggests red dresses have been causing perfectly pleasant chaos since the Middle Ages. This one continues the tradition with rather splendid results.
Why Choose Our Silk Slip Dress
Utterly Fetching Fabric: Crafted from 100 percent genuine silk satin at 85gsm, this is the sort of material that actually feels as good as it looks, which is quite the achievement.
The Colour of Confidence: Cosmic Crimson isn't your everyday red. It's a glorious, head-turning shade that photographs rather well and looks even better in person.
Made to Last: We produce this dress to order using eco-certified silk and slow fashion methods. Your piece arrives at your doorstep properly crafted, not mass-produced, which means it's built to remain fabulous for years.
Sustainably Conscious: Each order plants a tree. We've eliminated unnecessary waste by making everything to order, including this slip dress, so your purchase actually does some good in the world.
Featured in Vanity Fair: This design was recognised as a must-have for summer season by people who know rather more about fashion than most of us do.
Product Details
Material: 100 percent real satin silk, 85gsm weight
Delivery: Crafted to order. Allow 7 to 12 business days for your dress to arrive
Sizing: Available in XXS through 2XL with comprehensive measurements provided to ensure proper fit
Style: Slip dress design suitable for summer occasions and all manner of rather lovely events
This is the sort of dress that doesn't mess about. It's a properly handsome piece that manages to be both simple and utterly showstopping. Given that it's made to order, do consider placing your order soon to secure your Cosmic Crimson slip dress for the season ahead.
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!