EXAMPLE
“I’m usually the first one to get cold on the couch in the evening. This keeps me nice and warm, so I don’t have to grab another blanket.”
Monstroo™ Cozy Onesie
Monstroo™ Cozy Onesie
Stay warm without turning up the heating.
Zipper along the legs – bathroom breaks without taking it all off.
For cozy winter evenings together.
Not sure which size? Find yours here
When in doubt, go one size up.
BUNDLE UP & SAVE
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High demand! Only 7 left in stock.
30-day returns
Free shipping
30-day returns
Secure checkout
For adults & kids
What makes Monstroo special?
What makes Monstroo special?
What makes Monstroo special?
Cold nights. Warm cuddles. A little more silliness together. Meet your new favorite way to stay in.
- Cozy from the moment you slip in. Soft, fluffy fleece wraps you in warmth for slow mornings and movie marathons.
- Your warmth comes with you. From the couch to the kitchen, without dragging a blanket behind you.
- Bathroom breaks? Easy. The zipper along the legs means you don’t have to take the whole onesie off.
- Made for moments together. Match with your partner or the kids, take ridiculous photos and make ordinary nights more memorable.
- Free tracked shipping. Follow your Monstroo all the way home.
- 30-day returns. Not your perfect match? Return it within 30 days of receiving it under our return policy.
Slip in. Get cozy. Let your inner monster out.
Do I have to take it all off to use the bathroom?
Do I have to take it all off to use the bathroom?
No awkward undressing. Monstroo has a zipper along the inner legs that opens for bathroom breaks, so you can keep your onesie on and stay cozy.
Shipping & Returns
Shipping & Returns
Your Monstroo is on its way to cozier days. Estimated delivery:
- USA & Canada: 3–5 business days.
- United Kingdom & Australia: 3–7 business days.
Free shipping with tracking, so you can follow your Monstroo all the way home.
Not your perfect match? You have 30 days from delivery to request a return. See our return policy for details.
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
Part of over 12,000 families 💚
📦 USA & Canada: 3–5 business days · UK & Australia: 3–7 business days
♡ 30-day returns
🚚 Free shipping
SIZE GUIDE
Which size fits you?
Drag Monstroo to your height to find your size.
| Size | Height |
|---|---|
| Kids 1 | 105–115 cm |
| Kids 2 | 115–125 cm |
| Kids 3 | 125–135 cm |
| Kids 4 | 135–145 cm |
| S | 150–155 cm |
| M | 155–165 cm |
| L | 165–175 cm |
| XL | 175–185 cm |
What you love about Monstroo .
Example reviews · Fictional text and names for preview.
EXAMPLE
EXAMPLE
“I thought it might feel really bulky. But I can curl up on the couch comfortably and move around just fine.”
EXAMPLE
“Got it for my boyfriend as a surprise. He laughed at the look at first… now he puts it on as soon as he gets home.”
EXAMPLE
“My first question was: how do you go to the bathroom in this? The zipper along the legs means you don’t have to take the whole thing off. Really handy.”
EXAMPLE
“I was between sizes and wanted a looser fit. Followed the size chart and went with the bigger one. There’s plenty of room for a T-shirt underneath.”
EXAMPLE
“I wanted to give something other than a gift card for once. We both started laughing as soon as it was unwrapped. Now it’s part of our movie nights.”
Take mehome!
Why you need me at home.
YOU, WITHOUT MONSTROO
Turn up the heat. And the bill.
You want to feel warm. Not worry about the next bill.
YOUR MONSTROO
I’ll keep you warm – from the couch to the fridge.
Slip in and enjoy your evening – without turning up the heating.
YOU, WITHOUT MONSTROO
You get up. Your blanket stays behind.
Just grabbing something – and you’re cold again.
YOUR MONSTROO
I stay with you. Even when you get up.
Couch, kitchen or fridge: you move, I stay with you.
YOU, WITHOUT MONSTROO
Out of bed. Straight into the cold.
It was so cozy under the covers a moment ago.
YOUR MONSTROO
Slip into me. That first coffee just got cozier.
Slip into me and get cozy with your first coffee.
YOU, WITHOUT MONSTROO
Giving socks again?
You want more than a polite “thank you”.
YOUR MONSTROO
First, laughs while unwrapping. Then, a whole evening of cuddles.
A surprise to unwrap, wear and fall in love with.
YOU, WITHOUT MONSTROO
Comfortable. But pretty boring.
Your pajamas could belong to just about anyone.
YOUR MONSTROO
I make things monstrously cozy. And the photos? Priceless.
For movie nights, matching outfits and wonderfully silly photos.
Monster on the outside. Cozy on the inside.
Choose my MonstrooFamily in Action
I need a
vacation.
vacation.
I need
coffee.
coffee.
I’m hungry!
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Video unavailable. Please try again.
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Video unavailable. Please try again.
Hiii! ♡
30-day returns
Can I move in
for 30 days?
Get cozy with me. If we’re not the perfect match, you can return me within 30 days of receiving me under our return policy.
More about returnsYou ask. Monstroo answers.
Which size should I choose?
Choose based on your height and use our
size guide.
Between two sizes?
Choose the larger one for a relaxed fit.
How do I go to the bathroom?
Easy: Monstroo has a
zipper along the inner legs.
You can use the bathroom without taking
the whole onesie off.
When will my Monstroo arrive?
Estimated delivery times:
USA & Canada: 3–5 business days.
United Kingdom & Australia: 3–7 business days.
Shipping is free. Once your package is on its way, you’ll receive a tracking link.
USA & Canada: 3–5 business days.
United Kingdom & Australia: 3–7 business days.
Shipping is free. Once your package is on its way, you’ll receive a tracking link.
How do I wash my Monstroo?
Wash on a gentle cycle at
no more than 30°C and follow the care label.
Do not bleach. Air drying is best.
Do not iron the eyes, lips or fluffy fabric.
What if my Monstroo doesn’t fit?
You can return your Monstroo within
30 days of receiving it under our
return policy. You’ll also find instructions
on how to start your return there.
View our return policy
.
Is Monstroo available for kids too?
Yes! Monstroo is available for adults and kids.
Check the available sizes on the product page and
use our size guide to find the right fit based on height.
Does Monstroo make a good gift?
For someone who loves getting cozy?
It’s a monstrously lovely surprise.
Choose the right size and their favorite color – for your
favorite person, the family or yourself.