Warm enough to replace the blanket. Silly enough to get noticed.

The Onesie You Put On
To Do Nothing.

Meet The Bigslumpy — a deliberately oversized heavyweight fleece onesie with a ridiculous monster face, built for cold evenings, sofa days and answering the door without getting dressed.
Meet The Bigslumpy

Big Mouth Character

A ridiculous hooded face that gets noticed from across the room

Heavyweight Fleece

Deep-pile warmth with real weight in the hand

Oversized Fit

Roomy enough to pull straight over what you're already wearing

Phone-Ready Pocket

A proper front pocket for the phone you keep losing

Made For Nothing

Movie nights, cold kitchens, lazy Sundays and doing absolutely less

See The Slumpy

Real reactions, oversized fleece and the kind of face that makes someone reach for their phone.

One Onesie.
Every Evening Improved.

Heavyweight fleece for warmth, a roomy cut for layering and a monster face that takes lounging far too seriously.

Free Worldwide Delivery

Worldwide delivery available on every Bigslumpy order.

30-Day Returns

Try it at home. If it isn't for you, send it back within 30 days.

Honest Sizing

Measurements published in centimetres, with a height range to make choosing easier.

Heavyweight Fleece
Oversized On Purpose
Big Mouth Character
Unisex Fit
Phone-Friendly Pocket
30-Day Returns
Heavyweight Fleece
Oversized On Purpose
Big Mouth Character
Unisex Fit
Phone-Friendly Pocket
30-Day Returns
Heavyweight Fleece
Oversized On Purpose
Big Mouth Character
Unisex Fit
Phone-Friendly Pocket
30-Day Returns
Heavyweight Fleece
Oversized On Purpose
Big Mouth Character
Unisex Fit
Phone-Friendly Pocket
30-Day Returns
Heavyweight Fleece
Oversized On Purpose
Big Mouth Character
Unisex Fit
Phone-Friendly Pocket
30-Day Returns
Heavyweight Fleece
Oversized On Purpose
Big Mouth Character
Unisex Fit
Phone-Friendly Pocket
30-Day Returns

Built For Cold Evenings And Doing Nothing

Every part of The Bigslumpy is there for one very serious purpose: making staying in feel like the better plan.

Heavyweight Means Heavyweight

Deep-pile fleece gives The Bigslumpy real weight in the hand. It is the sort of difference you notice before you put it on — then notice again when the heating stays off and you are still warm.

Warmth Without The Blanket

The blanket is stuck on the sofa. The Bigslumpy comes with you. Pull it over your pyjamas, wander into the kitchen, answer the door and carry on with your evening without giving up the warmth.

Oversized, Not Randomly Sized

The room is built into the cut. Take the size you normally are rather than automatically sizing up. We publish the actual centimetres and a height range because guessing is boring.

The Pocket Actually Fits A Phone

Keep your phone close while you move around the house. No balancing it on the sofa. No digging underneath a blanket. Just a proper pocket on the front.

The problem

The Evening Starts The Same.

The heating is off because heating costs money. The blanket is on the sofa but it cannot follow you to the kitchen. You are wearing whatever was cheap enough to buy and nobody is quite warm.

The Bigslumpy changes the last part. Pull on heavyweight fleece, settle into the oversized cut and get on with your evening. No special occasion required.

Fits your actual evening

The Blanket, But You Can Walk.

The roominess is deliberate, so The Bigslumpy goes straight over pyjamas or whatever you already have on. It is made for sofa time, snack runs, cold mornings and answering the door without changing clothes.

And yes, the face is part of the point. It is silly on purpose — the kind of thing someone notices, laughs at and then asks where you got it.

Out of the box

Put It On. Become The Slumpy.

There is nothing to learn. Pull it on, zip up, put the hood up and enjoy the warmth. The heavyweight fleece does the cosy part while the oversized shape does the lounging part.

Machine washable at thirty, easy to live in and designed to earn more wear than a novelty costume ever should.

A gift that means it

The Present For Someone Who Has Everything — Except This.

For the friend who lives under a blanket. The partner who is always cold. The person who says they do not need anything and then steals your comfiest clothes.

The Bigslumpy is useful, ridiculous and memorable — which is a better combination than another gift that gets put in a drawer.

Have a question?

Help center

If you have an issue or question that requires immediate assistance, you can click the button below to chat live with a Customer Service representative.

Customer support team from: 8am to 7:30pm daily.

Average answer time: 5h.

Contact Us

Will The Bigslumpy Keep Me Warm?

What Is The Bigslumpy?

Where Can I Wear It?

What Sizes Does It Come In?

How Do I Wash It?

What If I Don't Love It?