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5 Best Onesies in the UK 2023 | Hatley, John Lewis and More

From the union suits worn by cowboys in the 19th century to the siren suits of the 40s, we've always enjoyed a good old all-in-one! These days though, the humble onesie is less related to workwear or underwear and is more about wearing something fluffy and snuggly to binge-watch our favourite series in. But with pyjama onesies gaining popularity as time goes on, we're sure you already know this.


It's easy to find where to buy an adult onesie online but it isn't quite so easy to find a guide to help you choose one – do you want footed or footless? Funny, cute or stylish? That's why we've created this buying guide which includes our top ten favourite onesies from the best brands on Amazon, John Lewis, ASOS and more. It's gonna be cosy this Christmas!

Last updated 02/02/2023
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Table of Contents

How to Choose a Onesie in the UK - Buying Guide

In this guide, we're going to look at some of the main factors to consider when shopping online for a onesie. From material and cut to the important features you want it to have, there's lots to ponder but we're here to help!

1

Consider the Material It's Made From

Consider the Material It's Made From

To determine the look and feel of your onesie, you'll first want to think about its material. Many onesies are made from polyester which is affordable, stain-resistant and long-lasting, or from a blend of polyester and cotton, with a small amount of elastane in the mix for stretchiness. 


The combination of polyester's durability with cotton's naturally breathable and hypoallergenic qualities makes for the perfect item to lounge around in! Fabric blends can include viscose too, which is highly absorbent, lightweight and soft. Polyester does have its downsides though – it is a synthetic, petroleum-based fibre which is not biodegradable. 


However, GRS or recycled polyester is gaining popularity. GRS (Global Recycle Standard) polyester still isn't biodegradable but it uses PET (polyethene terephthalate) which reduces dependence on petroleum. Diverting PET bottles to make recycled polyester reduces landfill and requires less energy than virgin polyester.

2

Onesies Come in a Choice of Cuts and Styles

Believe it or not, onesies are advanced enough to come in various cuts and styles. We tend to think of onesies as loose and slouchy but there's truly a cut for everyone. Read on to discover which is best for you.

A Slimmer, Tapered Fit Creates a More Flattering Silhouette

A Slimmer, Tapered Fit Creates a More Flattering Silhouette

If you like your loungewear to look as flattering as possible, consider a slimmer fitting onesie. They usually feature tapered sleeves and legs which allows for more movement, and often come in a lighter material too, making this type of onesie a great choice if you get hot easily.


Regular cut onesies are also neat and compact but with a little bit of give, and can either show up slimmer or on the relaxed side. Cosy without being too baggy, regular onesies are similar to wearing sweats.

A Fully Relaxed Cut Is Comfortable, Convenient and Great for Snuggles!

A Fully Relaxed Cut Is Comfortable, Convenient and Great for Snuggles!

Now here is the type of onesie we all recognise, and probably what most of us covet! A slouchier, more relaxed cut lets you get your snuggle on, and really, if you're going to wear an onesie, why not really go for it? 


Featuring elasticated cuffs, onesies with a relaxed cut are both comfy and convenient to wear around the house, especially when it's chilly outside. 

Super Relaxed, Maternity Onesies Allow for Maximum Movement and Growth

Super Relaxed, Maternity Onesies Allow for Maximum Movement and Growth

For all the expectant mamas out there, what could be better than a onesie designed especially for a growing bump? 


The super relaxed fit of a maternity onesie is perfect pregnancy wear, especially one with straight rather than gathered cuffs. This allows you more comfort and movement, even with swollen ankles!

3

Which Features Would You Like Your Onesie to Have?

Onesies often come with design features that make them more stylish or comfortable. Read on to decide which features you're looking for to help you choose the perfect onesie for you.

Stay Cosy in a Hood – Choose a Character Onesie to Make It Fun!

Stay Cosy in a Hood – Choose a Character Onesie to Make It Fun!

A hood is a welcome addition to a onesie, as it's not only cute but keeps you cosy. If you're looking for a bit of fun, go for a onesie with a character hood including ears and a face (and maybe a tail, too).


Some hoods have a fleece or fake fur lining making them even more snug in the colder months. You can choose from a fixed or detachable hood depending on how often you'll want to wear it.

Footed Onesies Are the Warmest Way to Get Through Winter With Non-Slip Bottoms for Safety and Convenience

Footed Onesies Are the Warmest Way to Get Through Winter With Non-Slip Bottoms for Safety and Convenience

If you're looking for the warmest onesie possible, it has to be a footed onesie. Sometimes called footed pyjamas, they are worn in the coldest parts of Canada and the USA in winter. 


The "feet" are made from the same material as the rest of the onesie but usually feature non-slip bottoms for safety and convenience.


We think they look cute and they come in a range of colours and styles, often for the whole family. Perfect for those who want to feel seriously snuggly this season!

Kangaroo or In-Seam Pockets Are Useful for Keeping Your Phone on You Whilst Wearing Your Onesie

Kangaroo or In-Seam Pockets Are Useful for Keeping Your Phone on You Whilst Wearing Your Onesie
Source:amazon.co.uk

Whether pockets are a must for you is a personal preference, but with many of us choosing to listen to podcasts whilst cooking or wanting to have our phones close by, they certainly are handy. If pockets are an important feature, choose from kangaroo and in-seam pockets.


Kangaroo pockets are sewn onto the front of the onesie and are large, easy to access and cosy to put your hands in. However, if you want pockets that are slightly more secure and subtle looking, choose in-seam pockets. Placed on the sides of the onesie, they are less obvious but still very accessible.

A Drop Seat Allows You to Use the Bathroom Without Having to Remove Your Garment

A Drop Seat Allows You to Use the Bathroom Without Having to Remove Your Garment
Source:amazon.co.uk

Let's be honest, the only downside to wearing a onesie is when it's time to go to the bathroom! If that has previously put you off from purchasing one, then the drop seat might just change everything for you.


A drop seat is a flap on the back of a onesie that allows the wearer to use the bathroom without having to take the whole thing off! This ingenious feature is typically sewn at the base of the flap and is secured by Velcro, buttons, or snaps across the top of the flap.

4

Always Check the Care Instructions

Always Check the Care Instructions

Most onesies are suitable for machine washing, which is great because onesies are, of course, made to be worn regularly! However, it's important to always check the description or label as some onesies should be hand-washed and may have specific instructions like needing to be dried flat.


Some onesies can even be tumble-dried which is super handy for making the wash turnaround quicker, giving you more snuggle time!

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5 Best Onesies in the UK

Whether you're looking for a onesie that is simple and subtle or something cosy and characterful, we've included all kinds of onesies in our list. So without further delay, here are our top 10 best picks to buy online!
Popularity
Products
Image
Price
Click to purchase
Key features
1

Big Feet Pajama Co.

Unisex Plush Footed Onesie

Big Feet Pajama Co.  Unisex Plush Footed Onesie 1枚目

£44.99

High Mid

Cozy and Convenient for Lounging and Sleeping In

2

LLXX

Unicorn Onesie

LLXX Unicorn Onesie 1枚目

£17.99

Low

One for the Fun Loving Extroverts

3

Little Blue House by Hatley

Fair Isle Bear & Moose Family Onesies

Little Blue House by Hatley Fair Isle Bear & Moose Family Onesies 1枚目

£35.00

High Mid

A Nordic Inspired Christmas Set for the Whole Family

4

Camille

Animal Print Soft Fleece Onesie

Camille Animal Print Soft Fleece Onesie 1枚目

£28.99

Mid

An On-Trend Print in a Relaxed Fit

5

Pokémon

Mens Pikachu Onesie

Pokémon Mens Pikachu Onesie 1枚目

£26.99

Mid

Perfect for Cosplay or a Rainy Day

If you don't see the product you're looking for, you can request that it be listed.
No.1

Big Feet Pajama Co. Unisex Plush Footed Onesie

Unisex Plush Footed Onesie Image 1
Source:amazon.co.uk
Unisex Plush Footed Onesie Image 2
Source:amazon.co.uk
Reference price
£44.99
High Mid
Reference price
£44.99
High Mid

Cozy and Convenient for Lounging and Sleeping In

In at number one, this plush footed unisex onesie from Big Feet Pajama Co. really takes cosy to the max. It has it all – a drawstring hood, an easy-to-use zipper, two kangaroo pockets, pyjama feet with non-slip soles and a drop seat (for easy bathroom visits)!


Made from 100% polyester, it's super durable and washes well, time after time. It's suitable for sleeping in as well as lounging, particularly if you feel the cold or would like to save on your heating bills! The navy blue shade is timeless and will appeal to everyone, so why not rope your household into getting a matching set? 

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No.2

LLXXUnicorn Onesie

Unicorn Onesie Image 1
Source:amazon.co.uk
Unicorn Onesie Image 2
Source:amazon.co.uk
Unicorn Onesie Image 3
Source:amazon.co.uk
Reference price
£17.99
Low
Reference price
£17.99
Low

One for the Fun Loving Extroverts

When we're looking to bring some magic and enchantment into our lives, unicorns usually do the trick. And this Unicorn onesie is no different! With a cute rainbow striped body covered in stars and an adorable unicorn hood and tail, putting this on will be an instant mood booster


The fleece material makes it very comfortable for wearing around the house, in bed or as fancy dress or cosplay, too. Well, you know what they say – always be yourself, unless you can be a unicorn. Then always be a unicorn.

No.3

Little Blue House by HatleyFair Isle Bear & Moose Family Onesies

Fair Isle Bear & Moose Family Onesies Image 1
Source:amazon.co.uk
Reference price
£35.00
High Mid
Reference price
£35.00
High Mid

A Nordic Inspired Christmas Set for the Whole Family

If the ultimate Christmas onesie is what you're looking for, then look no further. Available in a wide range of sizes for men, women, kids, babies and even the dog, these onesies are the perfect way to get into the holiday spirit as a family!


Made from 100% pure cotton, these high-quality onesies are soft, comfortable and breathable, so they'd work as sleepwear too if you like to be super cosy in bed. We only wish that they were footed, as the pyjama-style cotton fabric is not as warm as some winter onesies. 

No.4

CamilleAnimal Print Soft Fleece Onesie

Animal Print Soft Fleece Onesie Image 1
Source:amazon.co.uk
Animal Print Soft Fleece Onesie Image 2
Source:amazon.co.uk
Animal Print Soft Fleece Onesie Image 3
Source:amazon.co.uk
Reference price
£28.99
Mid
Reference price
£28.99
Mid

An On-Trend Print in a Relaxed Fit

Ever since Tiger King made its debut on our screens, animal prints have been even more popular than usual and we love this wild onesie by Camille. It comes in four purrfect print options which are all designed and made in the UK.


The soft fleece and generous cut with zip pockets and a hood are sure to keep you cosy all winter long. The zip front and elasticated cuffs make it handy and easy to wear, too. This is an excellent quality pick and a great choice if you want something that's fun whilst being stylish.

No.5

PokémonMens Pikachu Onesie

Mens Pikachu Onesie Image 1
Source:amazon.co.uk
Mens Pikachu Onesie Image 2
Source:amazon.co.uk
Reference price
£26.99
Mid
Reference price
£26.99
Mid

Perfect for Cosplay or a Rainy Day

There are plenty of onesies for men out there in sensible patterns and colours. But for the guys who just love to bring the fun, this Pikachu onesie is the best we've found! It would make an excellent gift for Pokémon fans too.


In a happy shade of yellow with a Pikachu hood and printed tail, it can be worn as a costume as well as for sleeping or lounging in. Also, the polyester material and wide range of sizes available make this onesie not just a novelty item but a really comfy piece to wear.

Top 5 Onesies

No. 1: Big Feet Pajama Co. Unisex Plush Footed Onesie

No. 2: LLXXUnicorn Onesie

No. 3: Little Blue House by HatleyFair Isle Bear & Moose Family Onesies

No. 4: CamilleAnimal Print Soft Fleece Onesie

No. 5: PokémonMens Pikachu Onesie

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The descriptions of each product are referenced from content available on manufacturer, brand, and e-commerce sites.
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