Bowser Onesie

£44.99

  • Material: bright yellow fleece with a light yellow belly panel
  • Design: green Bowser hood with red eyebrows, cream horns, orange hair and fangs, green spiked shell on the back, spiked tail
  • Cut: front zip, roomy fit, black cuffs with white spike studs
  • Occasions: Halloween, gaming nights, cosplay events, sofa marathons
  • Machine wash: safe, easy care
  • 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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Bowser Onesie

Bowser Onesie

£44.99

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  • Material: bright yellow fleece with a light yellow belly panel
  • Design: green Bowser hood with red eyebrows, cream horns, orange hair and fangs, green spiked shell on the back, spiked tail
  • Cut: front zip, roomy fit, black cuffs with white spike studs
  • Occasions: Halloween, gaming nights, cosplay events, sofa marathons
  • Machine wash: safe, easy care

Women’s Bowser Onesie for ruling the castle from the sofa

The Koopa King has finally left the Mushroom Kingdom for a night off. This Bowser onesie for adults brings the whole boss fight home in bright yellow fleece, with a lighter belly panel down the front and a green spiked shell stitched across the back. The hood carries the famous scowl, red eyebrows, cream horns and a flash of orange hair, while black cuffs studded with white spikes finish the look at the wrists. Zip it up and the living room becomes a lava-lit castle, minus the fireballs and the falling bridge.

Kidnap the remote tonight in a Men’s Bowser Onesie

Every Mario fan knows the feeling of hearing that roar right before the last level. The adult Bowser onesie turns the villain into the most comfortable person in the room. The roomy cut leaves space for a full evening of gaming, the spiked tail swings behind on the way to the fridge, and the zip makes the transformation quick. A Halloween costume, games night with the crew or a lazy Sunday of speedruns, this kigurumi handles all of it without a single power-up. Add it to the basket and claim the throne.

More legends waiting in the castle

The Mario onesie is the ideal match for a costume duo. Finally, the adult onesies collection covers every other design for grown-ups.

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