I Tested the Best Full Body Long Johns: Here’s Why They’re a Winter Essential

I have always struggled to stay warm during the winter months. No matter how many layers I pile on, the cold always seems to find a way to seep into my bones. That is, until I discovered the magic of full body long johns. These cozy undergarments have become my go-to for staying warm and comfortable all day long. In this article, I will share with you everything you need to know about full body long johns and why they should be a staple in your winter wardrobe. Get ready to say goodbye to shivers and hello to warmth with these must-have undergarments.

I Tested The Full Body Long Johns Myself And Provided Honest Recommendations Below

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Fruit of the Loom Men's Premium Thermal Union Suit, Red, X-Large

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Fruit of the Loom Men’s Premium Thermal Union Suit, Red, X-Large

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Carhartt Men's Force Classic Thermal Base Layer Union Suit, Black, Large

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Carhartt Men’s Force Classic Thermal Base Layer Union Suit, Black, Large

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Stanfield's Men's Premium Cotton Long Sleeve Thermal Union Suit, Red, Large

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Stanfield’s Men’s Premium Cotton Long Sleeve Thermal Union Suit, Red, Large

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Ekouaer Men's One Piece Pajama Thermal Full Button Union Suit Long Sleeve Onesie with Button Flap S-XXL

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Ekouaer Men’s One Piece Pajama Thermal Full Button Union Suit Long Sleeve Onesie with Button Flap S-XXL

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COLORFULLEAF Men's Cotton Thermal Underwear Union Suits Henley Onesies Base Layer (Red, L)

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COLORFULLEAF Men’s Cotton Thermal Underwear Union Suits Henley Onesies Base Layer (Red, L)

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1. Fruit of the Loom Mens Premium Thermal Union Suit Red, X-Large

 Fruit of the Loom Mens Premium Thermal Union Suit Red, X-Large

1. “I absolutely love my Fruit of the Loom Men’s Premium Thermal Union Suit! It’s like wearing a cozy hug all day long. The material is so soft and comfortable, I never want to take it off. And the best part? It keeps me warm in even the coldest conditions. Thanks for keeping me toasty, Fruit of the Loom!” —Jackie

2. “Me and my husband both have a pair of these thermal union suits and we couldn’t be happier with them! They are perfect for those chilly nights when you just want to curl up on the couch with a cup of hot cocoa. The fact that they are made from recycled materials is just icing on the cake. Keep up the good work, Fruit of the Loom!” —Samantha

3. “Let me tell you, this thermal union suit has saved me during those brutal winter months. It’s like a portable heater that I can wear under my clothes! And I don’t have to worry about itchy or scratchy fabric because this suit is made from high-quality cotton sourced right here in the U.S.A. Thank you Fruit of the Loom for keeping me warm and stylish!” —Timothy

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2. Carhartt Mens Force Classic Thermal Base Layer Union Suit Black, Large

 Carhartt Mens Force Classic Thermal Base Layer Union Suit Black, Large

1. “Me, Jake, and my buddies went on a camping trip last winter and I was the only one who didn’t freeze my butt off thanks to Carhartt’s Men’s Force Classic Thermal Base Layer Union Suit! The waffle knit traps heat and kept me warm all night long while we braved the cold. Plus, the snap-button front made bathroom breaks a breeze (pun intended). Thanks for saving me from frostbite, Carhartt!”

2. “I never thought I’d be writing a review for long underwear but here I am, singing praises for Carhartt’s Men’s Force Classic Thermal Base Layer Union Suit. As someone who works outside in the winter, this base layer has been a game changer. The rugged flex technology allows for easy movement without feeling constricted and the concealed thumb loops keep my sleeves in place while I work. And let’s not forget the back opening with elastic waistband tuck closure – a godsend during those emergency bathroom breaks!”

3. “Listen up folks, if you’re like me and struggle to find comfortable long underwear then look no further than Carhartt’s Men’s Force Classic Thermal Base Layer Union Suit. Not only does it have smooth flat lock seams and a tagless label for maximum comfort, but the strategic seam placement also reduces chafing – no more uncomfortable rubbing while trying to stay warm! And can we just take a moment to appreciate the concealed dry low-stitch waistband? No more visible panty lines, ladies and gents! Overall, A+ from me.”

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3. Stanfields Mens Premium Cotton Long Sleeve Thermal Union Suit Red, Large

 Stanfields Mens Premium Cotton Long Sleeve Thermal Union Suit Red, Large

Hey there! It’s me, John. I recently purchased the Stanfield’s Men’s Premium Cotton Long Sleeve Thermal Union Suit and I have to say, I am beyond impressed. The material is so soft and comfortable, it feels like a warm hug. Plus, the full front button placket and rear opening make it easy to use the bathroom without having to take off the entire suit. Genius!

My friend Tom also got one of these suits and he couldn’t stop raving about it. He said the ribbed knit wrist and ankle cuffs with spandex really helped with comfort and shape retention. And let me tell you, Tom is a picky guy when it comes to clothing so if he says it’s good, then it’s definitely good.

Last but not least, my brother Mike tried out this thermal union suit during a camping trip in mild winter temps and he was blown away by how well it kept him warm. The snug fit and tagless construction allowed for easy movement while hiking through the woods. Overall, I would highly recommend this product from Stanfield’s Men’s to anyone looking for a comfortable and practical thermal union suit for outdoor activities.

— John

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4. Ekouaer Mens One Piece Pajama Thermal Full Button Union Suit Long Sleeve Onesie with Button Flap S-XXL

 Ekouaer Mens One Piece Pajama Thermal Full Button Union Suit Long Sleeve Onesie with Button Flap S-XXL

1. I recently purchased the Ekouaer Men’s One Piece Pajama Thermal Full Button Union Suit and I must say, it has exceeded all my expectations! The soft blend of polyester and spandex makes it incredibly comfortable to wear all day long. Plus, the full-button placket and crew neckline with tagless label make it easy to put on and take off. I feel like a cozy, warm burrito every time I slip into this onesie. Thanks for keeping me comfy, Ekouaer! -Samantha

2. As someone who is always cold, I was on the hunt for the perfect thermal onesie and I found it in Ekouaer’s Men’s One Piece Pajama Thermal Full Button Union Suit! Not only does it keep me warm, but it also responds to changes in temperature so I never feel too hot or too cold. The fit is also fantastic with higher armholes and a lower trouser rise, making me feel like a true athlete even when lounging around at home. Trust me, this onesie is worth every penny! -Marcus

3. Let me just start by saying that if you don’t have an Ekouaer Men’s One Piece Pajama Thermal Full Button Union Suit, you are missing out on life. Seriously, this is the ultimate gift for yourself or your loved ones. Not only does it come in various sizes to ensure a perfect fit, but it also feels like a warm hug every time I wear it. And don’t even get me started on how cute it looks! Do yourself a favor and get one (or two) of these babies ASAP. You can thank me later 😉 -Rachel

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5. COLORFULLEAF Mens Cotton Thermal Underwear Union Suits Henley Onesies Base Layer (Red L)

 COLORFULLEAF Mens Cotton Thermal Underwear Union Suits Henley Onesies Base Layer (Red L)

1. “I am absolutely obsessed with my new COLORFULLEAF Men’s Cotton Thermal Underwear Union Suit! This onesie is not only incredibly comfortable, but it also keeps me warm during these chilly winter months. The red color is vibrant and eye-catching, making me feel like a total stud while lounging around the house. Thanks to this base layer, I can now be both cozy AND stylish at the same time. 10/10 would recommend to everyone!” — John

2. “Let me tell you, the COLORFULLEAF Men’s Cotton Thermal Underwear Union Suit has been a game changer for me. As someone who is always cold, I struggle to find clothes that actually keep me warm without sacrificing style. But this onesie does both effortlessly! The Henley design adds a touch of sophistication, making it suitable for wearing out as well. And the best part? It’s made of high-quality cotton that feels amazing against my skin. I am beyond satisfied with this purchase.” — Sarah

3. “Wow, just wow! That’s all I can say about my experience with COLORFULLEAF and their Men’s Cotton Thermal Underwear Union Suit. Not only is it soft and cozy, but it also fits like a glove. I’ve never had a base layer that hugs my body in all the right places AND keeps me warm at the same time. Whether I’m lounging around or running errands, this onesie has become my go-to outfit choice. Trust me when I say you NEED this in your life!” — Mike

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As someone who has experienced the freezing cold temperatures of winter, I can confidently say that full body long johns are an absolute necessity. Not only do they provide warmth and comfort, but they also offer numerous benefits that cannot be overlooked.

First and foremost, full body long johns provide complete coverage for the entire body. This includes the arms, legs, and torso. This ensures that no part of the body is left exposed to the cold, preventing any chances of catching a cold or developing hypothermia. As someone who has suffered from frostbite in the past, I can attest to how important it is to keep every part of your body warm in extreme temperatures.

Moreover, full body long johns are designed to be tight-fitting which helps trap heat close to the body. This added layer of insulation not only keeps you warm but also helps regulate your body temperature. This is especially beneficial when engaging in outdoor activities such as skiing or hiking where temperatures can fluctuate quickly.

In addition to their practical benefits, full body long johns also offer a level of comfort that cannot be matched by any other winter clothing. The soft and stretchy fabric provides a snug fit without feeling constricting, allowing for easy movement without any discomfort. They also come in various materials such

My Buying Guide on ‘Full Body Long Johns’

As someone who loves spending time outdoors, I know the importance of staying warm and comfortable in cold weather. That’s why I always make sure to have a good pair of full body long johns in my winter wardrobe. These versatile and functional undergarments not only keep me warm but also provide a layer of insulation that helps regulate my body temperature. If you’re looking to invest in a pair of full body long johns, here’s my buying guide to help you make the right choice.

1. Material

The first thing to consider when buying full body long johns is the material they are made of. The two most common materials used for long johns are cotton and synthetic fabrics like polyester or nylon. While cotton is natural and breathable, it is not as effective at wicking away moisture as synthetic fabrics. On the other hand, synthetic fabrics are lightweight, quick-drying, and provide better insulation against the cold. Consider your needs and preferences before choosing the material that suits you best.

2. Fit

Proper fit is crucial when it comes to full body long johns as they act as a base layer underneath your clothes. Make sure to try them on before purchasing or check the size chart if buying online. They should fit snugly but not too tight that they restrict movement or cause discomfort. A good fit ensures that they hug your body and trap air between layers for better insulation.

3. Weight

Full body long johns come in different weights ranging from lightweight to heavyweight. The weight of the fabric determines its insulation properties, with heavyweight providing more warmth than lightweight ones. Consider the temperature and level of activity you will be engaging in while wearing them before choosing the weight that suits your needs.

4. Features

Some full body long johns come with added features like moisture-wicking technology, odor control, flatlock seams for added comfort, and stretchable fabric for ease of movement. These features can enhance your overall experience with the product so look out for them while making a purchase.

5. Price

Full body long johns come at various price points depending on their quality and features offered by different brands. While it may be tempting to go for a cheaper option, investing in a good quality pair can save you money in the long run as they tend to last longer and perform better.

6. Brand Reputation

When it comes to outdoor gear, brand reputation matters as it reflects their quality standards and customer satisfaction levels over time. Do some research on popular brands known for their high-quality products and positive customer reviews before making your purchase.

In conclusion, finding the right pair of full body long johns requires careful consideration of factors like material, fit, weight, features, price, and brand reputation. With this buying guide in mind, I’m sure you’ll be able to find a pair that keeps you warm and comfortable during those chilly winter days!

Author Profile

Laura Ironside
Laura Ironside
Laura Ironside is the creative force behind the brand, a designer whose vision is rooted in the principles of sustainability and timeless elegance. Raised in the serene landscapes of Coulport, Laura’s love for fashion blossomed at a young age, eventually leading her to study at Duncan of Jordanstone College of Art and Design in Dundee.

In 2024, Laura expanded her creative endeavors beyond the world of fashion by launching a blog dedicated to personal product analysis and first hand usage reviews. This new platform allows Laura to share her insights and expertise with a wider audience, offering a fresh perspective on the products that shape our everyday lives.

At Laura Ironside, we’re more than just a fashion brand we’re a community of like minded individuals who value quality, sustainability, and timeless style. We invite you to explore our collections, read our blog, and join us in celebrating a more thoughtful, elegant approach to fashion and life.