Rainbow Unicorn Onesie

£39.99

  • Fabric: soft flannel, light enough for a long evening indoors
  • Look: pastel gradient of pink, mint, yellow and blue scattered with white stars
  • Fit: zip from collar to waist with close fitting cuffs at the wrists
  • Versatility: birthdays, group fancy dress, photo shoots, cosy evenings
  • Washing: machine washable and easy to look after
  • Ultra-soft fabric | Warm and comfortable
  • Pyjamas and costume | Two in one
  • Any occasion | Bedtime, parties, film nights
  • Gift-ready | One they’ll actually wear
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Size Chart

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  • Fabric: soft flannel, light enough for a long evening indoors
  • Look: pastel gradient of pink, mint, yellow and blue scattered with white stars
  • Fit: zip from collar to waist with close fitting cuffs at the wrists
  • Versatility: birthdays, group fancy dress, photo shoots, cosy evenings
  • Washing: machine washable and easy to look after

Every shade gets a turn on the Women’s Rainbow Unicorn Onesie

Instead of picking a colour, this rainbow unicorn onesie for adults blends them. Pink melts into mint, mint into pale yellow and yellow into blue, with no hard edge anywhere on the fabric. White stars sit across the whole gradient, so the piece keeps its sparkle even in a dim room.

The hood follows the same pastel logic, finished with a purple horn and soft ears that stand up on their own. A zip opens the front from collar to waist, the cuffs hug the wrists to keep draughts out and the fabric stays light enough to wear through a long evening indoors.

Men’s Rainbow Unicorn Onesie for the loudest outfit in the room

An adult rainbow unicorn onesie is made to be noticed. It reads as fancy dress at a themed party and as pyjamas the second you step back inside, which is why it travels so well to sleepovers and weekends away. The cut suits every body type.

The pastel gradient also flatters photos far better than a flat colour, since the light changes across every fold. Order it for a birthday, a festival or the simple pleasure of spending a whole Sunday dressed as a mythical horse.

Follow the rainbow further

The kids rainbow unicorn onesie repeats the pastel gradient for younger fans, ideal for a matching pair. For a single strong shade instead, the pink unicorn onesie keeps things classic in candy flannel. Every version sits side by side in the unicorn onesies collection.

Frequently Asked Questions

They’re made to keep you warm on the sofa through autumn and winter, so yes, they’re cosy. The relaxed fit lets air move around, though, so you won’t get that stuffy feeling you get from tight pyjamas.
Machine wash at 30°C on a gentle cycle. Turn them inside out and pop them in a mesh laundry bag to protect the hood. Skip the tumble dryer and the iron. They air-dry quickly and fluff right back up on their own.
Yes, every onesie we sell is unisex. The roomy cut works for men and women alike, our kids’ styles fit girls and boys just the same, and our baby sizes are cut the same way for everyone. Just check the size chart to find your fit.
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Adult size chart (measurements in cm)

SIZEHEIGHTCHESTSHOULDER WIDTHSLEEVE LENGTHONESIE LENGTH (EXCLUDING HOOD)
S144 - 1531164650127 - 130
M154 - 1631204853137 - 140
L164 - 1731245056147 - 150
XL174 - 1831285259157 - 160