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Onesies

What Are Onesies for Adults Called? Understanding the Cozy Trend

by Relaxed Nights 11 Jul 2025

Table of Contents

  1. Introduction
  2. The Evolution of the Onesie
  3. What Are Adult Onesies Called?
  4. The Benefits of Wearing Onesies for Adults
  5. How to Choose the Perfect Adult Onesie
  6. Styling Your Adult Onesie
  7. The Relaxed Nights Collection
  8. Conclusion
  9. FAQ

Introduction

Who would have thought that a garment once primarily associated with infants would evolve into a beloved fashion staple for adults? The resurgence of onesies for adults has taken the fashion world by storm, blending comfort and style in a way that few other items can. This post explores the world of adult onesies, often simply referred to as "onesies," and discusses their evolution, various styles, and how they fit into our modern lifestyles.

At Relaxed Nights, we are passionate about comfort and elegance, and we believe that every woman deserves to feel beautiful and cozy in her nightwear—whether it’s a classic nightgown or a trendy onesie. Join us as we delve into the fascinating journey of adult onesies, their cultural significance, and the unique offerings available in our collection.

By the end of this blog post, you’ll not only understand what adult onesies are called, but also appreciate their versatility and how they can enhance your evening and nighttime routines. We will cover the history of onesies, the different styles available, their benefits, and how to choose the perfect onesie for your needs.

Let’s embark on this cozy journey together!

The Evolution of the Onesie

A Brief History

The term "onesie" originally referred to a type of infant bodysuit, coined by Gerber Childrenswear in the 1980s. However, the concept of a one-piece garment has been around for much longer, with variations like the union suit and the jumpsuit appearing in the 19th and 20th centuries, respectively. These garments were designed to offer comfort and ease of movement, making them popular for both everyday wear and sleep.

The adult onesie, as we know it today, began to gain traction in the late 2000s. It was initially popularized as loungewear and sleepwear but quickly transitioned into streetwear, especially in the UK and Australia. The rise of social media also played a significant role in its popularity, as influencers and celebrities showcased their cozy ensembles, making them a must-have for many.

The Return of the Onesie

The adult onesie saw a significant revival during the energy crisis of 2022, as many sought comfort and warmth without cranking up the heat. This trend highlighted the onesie’s practicality as a warm garment that could be worn around the house, while still retaining an element of style.

At Relaxed Nights, we recognize the importance of comfort in our daily lives, and our collection of onesies is crafted to reflect this ethos. Each piece is made with high-quality materials, ensuring that you not only look good but feel amazing as well.

What Are Adult Onesies Called?

Common Terminology

While the term "onesie" is widely recognized, adult onesies are often referred to by various names, including:

  • Jumpsuits: A more general term that encompasses various styles, including those designed for sleep or lounging.
  • Kigurumi: These are animal-themed onesies originating from Japan, often used for cosplay or loungewear.
  • Sleepwear or Pajama Jumpsuits: Terms that emphasize the garment's primary use for sleep or relaxation.

No matter what you call them, the essence of adult onesies remains the same: they’re designed for comfort, ease, and style.

Differentiating Styles

Adult onesies come in various styles and designs, catering to different preferences and occasions. Here are a few popular styles that we offer at Relaxed Nights:

  • Classic Onesies: These are simple, often solid-colored or minimally patterned, and designed for ultimate comfort. Perfect for lounging at home or cozying up for a movie night.
  • Kigurumi: Adorned with fun and whimsical designs, kigurumi onesies resemble animals or cartoon characters, adding a playful touch to your wardrobe.
  • Zip-Up Onesies: Featuring a front zip for easy wear, these are practical for those who appreciate convenience without sacrificing style.
  • Two-Piece Sets: While not technically a onesie, these sets offer the same comfort level with a top and bottom that can be mixed and matched.

Regardless of the style you prefer, our collection at Relaxed Nights ensures that you find the perfect fit for your evening routine.

The Benefits of Wearing Onesies for Adults

Comfort

One of the main reasons for the onesie’s popularity is its unparalleled comfort. Crafted from soft, breathable materials, our onesies are designed to feel amazing against the skin, allowing you to unwind after a long day. The loose-fitting design provides freedom of movement, making them ideal for lounging, sleeping, or even enjoying a cozy evening at home.

Versatility

Adult onesies are incredibly versatile. They can be worn as sleepwear, loungewear, or even as a quirky outfit for casual outings. With various styles available, you can easily dress up a onesie with accessories or layer it with a stylish robe for a chic look. This adaptability makes them a valuable addition to any wardrobe.

Warmth

As highlighted during the recent energy crisis, onesies serve as an effective way to stay warm without relying heavily on heating systems. Their full-coverage design not only keeps you cozy but also allows you to save on energy costs. Our onesies at Relaxed Nights are crafted from high-quality fabrics that provide insulation while remaining breathable—perfect for those chilly nights.

Self-Expression

Wearing a onesie can be a fun way to express your personality. With an array of designs, colors, and patterns available, you can choose a onesie that reflects your interests, whether it's a whimsical animal design or a more elegant, understated look. This element of self-expression is something we value at Relaxed Nights, as we believe every woman should feel beautiful and comfortable in her own skin.

How to Choose the Perfect Adult Onesie

Consider the Fabric

The fabric of your onesie can significantly impact your overall comfort. Look for high-quality materials that are soft, breathable, and durable. At Relaxed Nights, we pride ourselves on using premium fabrics that feel luxurious against the skin and stand the test of time.

Fit and Size

When selecting a onesie, consider the fit and size that suits you best. Some people prefer a more fitted style, while others enjoy the freedom of a looser fit. Our collection offers a range of sizes to accommodate different body types, ensuring that you find the perfect fit.

Design and Style

Choose a design that resonates with you. Whether you prefer fun and playful kigurumi styles or elegant, minimalist designs, there's a onesie for everyone. Our curated collections at Relaxed Nights cater to various tastes and preferences, allowing you to find something that feels uniquely yours.

Occasion

Think about where and when you’ll be wearing your onesie. If you’re looking for something to wear for a cozy night in, you might opt for a classic or patterned design. However, if you're considering wearing it out for a casual gathering, a more stylish or sophisticated option might be appropriate.

Care Instructions

Always check the care instructions before purchasing a onesie. Proper care will ensure that your garment lasts longer and maintains its quality. Our onesies at Relaxed Nights are designed to be easy to care for, allowing you to enjoy their comfort without the hassle.

Styling Your Adult Onesie

Layering for Extra Warmth

One of the best ways to style your adult onesie is through layering. Consider pairing your onesie with a stylish robe or a cozy cardigan for added warmth and a chic look. This is especially useful during the colder months when you want to stay warm without sacrificing style.

Accessories

Adding accessories can elevate your onesie look. Consider pairing your onesie with fun socks, a beanie, or even a scarf. This allows you to express your style while keeping comfortable. At Relaxed Nights, we focus on creating versatile pieces that can be easily styled with various accessories.

Footwear Choices

Depending on where you're planning to wear your onesie, your choice of footwear can significantly impact the overall look. For lounging at home, consider fluffy slippers or cozy socks. If you're stepping out, stylish sneakers or ankle boots can add a trendy touch.

The Relaxed Nights Collection

At Relaxed Nights, we believe in the power of comfort and elegance. Our collection of adult onesies is designed with high-quality materials and attention to detail, ensuring that you feel beautiful and cozy every night. Here are some highlights from our selection:

Kigurumi Onesies

Our playful kigurumi onesies are perfect for those who want to bring a bit of fun into their loungewear. Whether you're a fan of animals or whimsical characters, our kigurumi collection is sure to delight.

Explore our Kigurumi Collection for a variety of playful designs.

Classic Onesies

For those who prefer a simple yet elegant look, our classic onesies are the perfect choice. These garments are designed for maximum comfort, making them ideal for sleep or lounging.

Discover our Onesies Collection to find your next favorite piece.

Two-Piece Sets

If you love the idea of a onesie but prefer the versatility of two pieces, our two-piece sets offer the best of both worlds. With coordinating tops and bottoms, you can mix and match to create your perfect loungewear ensemble.

Check out our Women Sets Collection for more options.

Conclusion

Adult onesies have become a beloved staple in modern loungewear, offering a unique blend of comfort, style, and self-expression. As we’ve explored, these versatile garments have a rich history and continue to adapt to contemporary trends. Whether you call them onesies, jumpsuits, or kigurumi, the essence remains the same: they are designed for relaxation and comfort.

At Relaxed Nights, we are dedicated to providing you with premium nightwear that enhances your evening and nighttime routines. Our collection of onesies and other sleepwear is crafted with care and attention to detail, ensuring that you feel beautiful and comfortable.

As you consider adding an adult onesie to your wardrobe, remember to think about the fabric, fit, and style that resonate with you. Embrace the cozy trend and allow yourself the joy of unwinding in style.

FAQ

What are adult onesies typically made from?
Adult onesies are usually made from soft, breathable materials such as cotton, fleece, or polyester blends that provide comfort and warmth.

Can onesies be worn outside?
Yes, many people wear onesies outside as casual wear. They can be styled with accessories and footwear to create a fashionable look for outings.

Are there different styles of adult onesies?
Absolutely! There are various styles, including classic ones, kigurumi designs, zip-up ones, and two-piece sets, catering to different preferences and occasions.

How do I care for my onesie?
Always check the care label for specific instructions, but generally, onesies can be machine washed on a gentle cycle and tumble dried on low heat.

Where can I find quality adult onesies?
You can explore our curated collection at Relaxed Nights, where we offer a range of stylish and comfortable onesies designed to elevate your relaxation experience. Check out our Onesies Collection for more options.

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