Baby Iron Man Onesie

£34.99

  • Made from: soft, warm flannel
  • Design: red body with gold panels on the chest and arms, arc reactor on the front, Iron Man hooded mask
  • Fit: long elastic cuffs for a secure fit, roomy cut
  • Perfect for: naps, superhero photos, chilly mornings, first Halloween
  • Care: machine washable
  • 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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  • Made from: soft, warm flannel
  • Design: red body with gold panels on the chest and arms, arc reactor on the front, Iron Man hooded mask
  • Fit: long elastic cuffs for a secure fit, roomy cut
  • Perfect for: naps, superhero photos, chilly mornings, first Halloween
  • Care: machine washable

Newborn Iron Man Onesie gives a baby the cosiest armour of the Avengers

Give your little one the chance to dream big with our Iron Man onesie for babies, ideal for young superhero fans. Designed to guarantee exceptional comfort, this all-in-one draws inspiration from the fascinating world of Marvel and the Avengers. Picture the smiles in the morning, your child feeling as bold and inventive as Tony Stark himself.

The flannel fabric of this garment offers reassuring warmth while its roomy fit allows ideal freedom of movement. Your child can move freely, as if wearing Iron Man’s real armour. It is the perfect choice for long hours of play or peaceful nights, and it comes in sizes from 3 to 30 months.

A mini Tony Stark ready for adventures in an Infant Iron Man Onesie

Wrap your baby in the warm embrace of our baby Iron Man pyjamas and watch them set off on epic adventures. The iconic colours of Iron Man’s armour instantly evoke the courage and team spirit of the Avengers. With a snug hood and a zip closure, this outfit is as adorable as it is practical.

This one-piece combines fun and function, fueling their dreams while keeping them nice and warm. Add it to your basket for superhero nights with your little Avenger.

Assemble your family superhero team

Grown-ups can join the fun in the Iron Man onesie, made in the very same style. The baby Captain America onesie is the ideal companion for a baby photo duo. Finally, browse the whole baby onesies collection for more tiny outfits.

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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  • 1-2 day dispatch
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  • Support 7 days a week
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Baby size chart (measurements in cm)

SIZEHEIGHTCHESTSHOULDER WIDTHSLEEVE LENGTHONESIE LENGTH (EXCLUDING HOOD)
3 - 6 months50 - 6556 - 59252556 - 58
6 - 9 months65 - 75622727 - 2862 - 63
9 - 12 months75 - 8565 - 682929 - 3168
12 - 18 months85 - 9068 - 723131 - 3373 - 74
18 - 24 months90 - 9571 - 803333 - 3678 - 79
24 - 30 months95 - 10574 - 863535 - 3983 - 84