Alien Onesie

£39.99

  • Fabric: fleece to stay nice and warm
  • Design: bright green from hood to ankles, black almond eyes on the hood
  • Fit: roomy, offering optimal freedom of movement
  • Occasions: sci-fi marathons, Halloween, conventions, lazy Sundays
  • Care: machine washable, easy upkeep
  • 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
In stock, dispatched within 1-2 working days
Size Chart

30% OFF ACCESSORIES

Complete your look

Alien Onesie

Alien Onesie

£39.99

Lime Claw Slippers

Lime Claw Slippers

£21.99 £15.39

Lime Claw Gloves

Lime Claw Gloves

£17.99 £12.59

£79.97 £67.97
Save £12.00
Free delivery

Free
Delivery

Secure payment

Secure
Payment

Support 7 days a week

Support
7 Days a Week

  • Fabric: fleece to stay nice and warm
  • Design: bright green from hood to ankles, black almond eyes on the hood
  • Fit: roomy, offering optimal freedom of movement
  • Occasions: sci-fi marathons, Halloween, conventions, lazy Sundays
  • Care: machine washable, easy upkeep

Women’s Alien Onesie to embrace sci-fi spirit with irresistible UFO charm

Want to bring a touch of originality to your relaxing moments under the covers? Our alien onesie for adults is the UFO of cosy fashion. With its look inspired by the unknown, its snuggly comfort and its cosmic style, you will never go unnoticed again.

Made of ultra-soft fleece, this nightwear transports you into a science fiction world. Its snuggly hood wraps you in warmth, while its roomy cut guarantees perfect freedom of movement. You will love slipping into this onesie after a long day for long hours of relaxation, nice and warm.

A resolutely cosmic look straight from the mothership in a Men’s Alien Onesie

Picture yourself bundled up in this adult alien onesie, ready to explore extraterrestrial space from your sofa. Its long elasticated sleeves, which keep the warmth in without squeezing your wrists, make this onesie a must-have for anyone who loves a snuggly night in.

Invite the unknown into your night-time wardrobe. Order our one-piece pyjama set now and treat yourself (or your loved ones) to the most cosmic experience there is. Your new cosy ally is just a few clicks away. Bring science fiction all the way into your nightwear and turn every evening into a journey worthy of the best UFO films.

Give your relaxing moments a brilliant boost

The Toy Story Alien onesie shares the same playful spirit and works well for group outfits. More creatures from beyond gather in the Halloween 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.
My Onesie tote bag

Check out in just a few clicks

Add your favourites to your basket using the icon in the top right corner of your screen, fill in your details and place your order.

  • Free delivery
  • 1-2 day dispatch
  • Secure payment
  • Support 7 days a week
×

Adult size chart (measurements in cm)

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