10% off your first order when you sign up

Free next day UK delivery on orders over £200

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cosmos lounge set

$465

Select your size

10% off your first order when you sign up


- FREE next day delivery on orders over £200
- Fast & easy returns
- Interest-free payments with clearpay

It's Koi Because... Arrow Down
We can never say 'no' to a bit of luxe loungewear. Sleepers Cosmos lounge suit is designed with an oversized collar, flared detailing and contrast buttons. Koigirls, get ready to set your wardrobe to 'relaxed'.
Geeky Deets Arrow Down
- Sold as set
- Ruffle details
- Button closure at front
- Dry clean
- 48% nylon, 32% polyester, 5% spandex, 15% metallic line
SIZE AND FIT Arrow Down
- Relaxed fit
- We recommend taking your usual size
- Model is 5' 10’’, is a size 8UK and wears a size S
About the Brand Arrow Down
Launched by two former editors, sleeper was inspired by a dream in a pyjama factory. One year later, Sleeper was born, creating beautiful nightwear that was made for partying - and hitting the hay once you're done.
DELIVERY & RETURNS Arrow Down

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