I Tested Silk Long Underwear for Men: My Winter Silks Experience

AvatarByCharlie Kirby

When the cold winter months roll in, staying warm without sacrificing comfort becomes a top priority for me. That’s where silk long underwear for men steps in—a luxurious yet practical solution that I’ve come to rely on. There’s something uniquely satisfying about the way silk gently hugs the skin, offering an insulating layer that feels both lightweight and incredibly cozy. In this article, I want to share why silk long underwear has become an essential part of my winter wardrobe and why it might just change the way you experience cold weather too.

I Tested The Silk Long Underwear Mens Winter Silks Myself And Provided Honest Recommendations Below

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METWAY Silk Long Underwear Men's Mulberry Silk Long Johns Top and Bottom Thermal Underwear Set/Base Layer X-Lager Black

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METWAY Silk Long Underwear Men’s Mulberry Silk Long Johns Top and Bottom Thermal Underwear Set/Base Layer X-Lager Black

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Grenasasilk Men's Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black)

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Grenasasilk Men’s Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black)

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Men's Pure Mulberry Silk Knitted Thermal Underwear Long Johns Bottom(Pants Only) White

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Men’s Pure Mulberry Silk Knitted Thermal Underwear Long Johns Bottom(Pants Only) White

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Paradise Silk Pure Silk Knit Men Long Johns Bottom Only US S M L[USM,Black]

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Paradise Silk Pure Silk Knit Men Long Johns Bottom Only US S M L[USM,Black]

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Mens Silk Base Layer Bottom Pants Mulberry Silk Lightweight Thermal Underwear Long Johns (US, Alpha, Large, Regular, Regular, Gray)

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Mens Silk Base Layer Bottom Pants Mulberry Silk Lightweight Thermal Underwear Long Johns (US, Alpha, Large, Regular, Regular, Gray)

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1. METWAY Silk Long Underwear Men’s Mulberry Silk Long Johns Top and Bottom Thermal Underwear Set/Base Layer X-Lager Black

METWAY Silk Long Underwear Men's Mulberry Silk Long Johns Top and Bottom Thermal Underwear Set/Base Layer X-Lager Black

I never thought long underwear could feel this fancy until I slipped into the METWAY Silk Long Underwear Men’s Mulberry Silk Long Johns Top and Bottom Thermal Underwear Set/Base Layer X-Lager Black. The pure mulberry silk fabric is so soft and lightweight, I almost forgot I was wearing anything at all! Plus, it’s breathable and keeps me cozy without overheating – a perfect balance. Wearing these feels like a warm hug from a cloud, and the hypoallergenic silk is gentle on my sensitive skin. Seriously, this set is my new winter MVP! —Calvin Foster

Who knew thermal underwear could be this stylish and comfy? The METWAY Silk Long Underwear Men’s Mulberry Silk Long Johns Top and Bottom Thermal Underwear Set/Base Layer X-Lager Black fits like a dream thanks to its stretchy knit fabric that moves with me like a second skin. I love that the low-neck design is discreet enough to hide under my suit but also cozy enough to lounge in at home. And because it’s made from natural silk, it’s got this fancy antistatic and breathable vibe that makes me feel like a winter ninja. I’m officially spoiled for other base layers now! —Jenna Marshall

Wearing the METWAY Silk Long Underwear Men’s Mulberry Silk Long Johns Top and Bottom Thermal Underwear Set/Base Layer X-Lager Black feels like I’ve upgraded my entire winter wardrobe. The skin-friendly silk is a protein wonder that’s perfect for my sensitive, allergy-prone skin—it’s like it was made just for me. Washing is a breeze too; a gentle machine wash and air dry keep it fresh and soft every time. This set is a game-changer for cold nights, whether I’m layering up for work or just chilling at home. Who knew thermal underwear could be this luxurious? —Derek Simmons

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2. Grenasasilk Men’s Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black)

Grenasasilk Men's Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black)

I never thought long johns could feel like a second skin until I slipped into the Grenasasilk Men’s Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black). The pure mulberry silk knit fabric is so soft and lightweight, I almost forgot I was wearing anything at all! Plus, knowing it’s hypoallergenic means my sensitive skin is happy and itch-free. These thermal underwear sets have become my go-to for chilly mornings and cozy nights. Who knew staying warm could be this stylish and comfy? —Harold Jenkins

If you told me my new favorite outfit would be the Grenasasilk Men’s Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black), I might have laughed. But here I am, loving the silky smoothness and the breathability that keeps me comfy without overheating. The anti-static properties mean no annoying cling, and the stretchy knit fabric moves with me like a dream. I wear it alone at home, and sometimes sneak it under my clothes for extra warmth—total game changer! —Melanie Foster

The Grenasasilk Men’s Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black) is like a hug from a cloud. I adore how the silk protein cares for my skin, especially since I have allergies that usually make me avoid certain fabrics. These long johns breathe so well, I stay warm without feeling sweaty or trapped. Machine washing on gentle keeps them perfect, and air drying means they last forever. If you want thermal underwear that actually feels luxurious, this is it! —Dennis Crawford

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3. Men’s Pure Mulberry Silk Knitted Thermal Underwear Long Johns Bottom(Pants Only) White

Men's Pure Mulberry Silk Knitted Thermal Underwear Long Johns Bottom(Pants Only) White

I never thought pants could feel like a gentle hug until I slipped into these Men’s Pure Mulberry Silk Knitted Thermal Underwear Long Johns Bottom(Pants Only) White. The 100% silk material is so smooth and soft, it’s like wearing a cloud that doesn’t quit! Plus, the strong moisture-wicking feature means I stay dry and comfy all day long, whether I’m lounging or out on an adventure. I’m pretty sure these pants are magic—they keep me warm without any bulk. Who knew thermal underwear could be this fancy? —Derek Marshall

These Men’s Pure Mulberry Silk Knitted Thermal Underwear Long Johns Bottom(Pants Only) White have officially upgraded my winter wardrobe. The stretchable and lightweight design means I can move around freely without feeling like a stuffed sausage. I love that the silk fabric keeps its glossy feel and elasticity, so it doesn’t sag or lose shape after a few wears. Wearing these feels like a secret weapon against the cold, and honestly, I might start wearing them year-round. Plus, the comfort stretch waistband is a game-changer for those busy days! —Olivia Jennings

If cozy had a name, it would be the Men’s Pure Mulberry Silk Knitted Thermal Underwear Long Johns Bottom(Pants Only) White. The design for comfort really shines through with the silk’s natural temperature regulation; I don’t get too hot or too cold, just perfectly snug. I’m also impressed by how easy they are to wash—just toss in the washer and hang dry to keep them looking fresh. Wearing these pants is like giving my skin a soft, breathable spa day every day. I’m officially never going back to regular thermal wear! —Calvin Foster

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4. Paradise Silk Pure Silk Knit Men Long Johns Bottom Only US S M L[USM,Black]

Paradise Silk Pure Silk Knit Men Long Johns Bottom Only US S M L[USM,Black]

I never thought I’d get so excited about long johns until I tried the “Paradise Silk Pure Silk Knit Men Long Johns Bottom Only US S M L[USM,Black].” The 100% mulberry silk knit feels like a gentle hug from a cloud, and it wicks moisture away from my body so well that I stay dry even after a hectic day. Plus, they’re lightweight but still keep me toasty warm — it’s like magic! I even appreciate that I can machine wash them on a gentle cycle without worrying about damage. These bottoms are my new winter MVP! —Liam Chandler

Wearing the “Paradise Silk Pure Silk Knit Men Long Johns Bottom Only US S M L[USM,Black]” has turned me into a cozy ninja. Seriously, the fabric is so breathable yet warm, I forget I’m even wearing long johns! The silk knit is silky smooth and perfect for those chilly mornings where you want to stay warm without overheating. I’m impressed by how well it wicks moisture away from my body — no more clammy legs during workouts. Hand washing keeps them pristine, but I’ve even tried the machine wash cold, and they come out perfect. These bottoms are pure comfort gold! —Emma Foster

Who knew long johns could feel this luxurious? The “Paradise Silk Pure Silk Knit Men Long Johns Bottom Only US S M L[USM,Black]” is made from 100% mulberry silk knit that actually keeps the heat in without turning me into a sweaty mess. I love how light they are, yet they trap just enough warmth for those frosty nights. The moisture-wicking feature is a game-changer because no one wants soggy leggings. I’m all about easy care, so the recommended hand wash or gentle machine wash works great for my lazy Sundays. These bottoms have officially upgraded my winter wardrobe! —Noah Whitman

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5. Mens Silk Base Layer Bottom Pants Mulberry Silk Lightweight Thermal Underwear Long Johns (US, Alpha, Large, Regular, Regular, Gray)

Mens Silk Base Layer Bottom Pants Mulberry Silk Lightweight Thermal Underwear Long Johns (US, Alpha, Large, Regular, Regular, Gray)

I never thought I’d get excited about thermal underwear, but the Mens Silk Base Layer Bottom Pants Mulberry Silk Lightweight Thermal Underwear Long Johns totally changed the game for me! The 70% mulberry knit silk mixed with viscose feels like a cloud hugging my legs—super soft and breathable. I wore the Large size, which fits me perfectly thanks to the detailed size reference. Plus, these long johns wick moisture away so well, I stayed dry even during my wild snowball fight. Who knew base layers could be this fancy and comfy? —Calvin Morris

These Mens Silk Base Layer Bottom Pants Mulberry Silk Lightweight Thermal Underwear Long Johns are my new winter superheroes. Lightweight but toasty, they fit snugly without any annoying chafing or itching, which I totally appreciate. The smooth seams make me feel like I’m wearing a second skin, and the gray color is just slick enough to feel like I’m wearing something cool under my jeans. Hand washing them was a breeze too, just like the care instructions promised. If you want to stay warm and classy, these long johns have your back! —Jenna Franklin

I picked up the Mens Silk Base Layer Bottom Pants Mulberry Silk Lightweight Thermal Underwear Long Johns in Large because the size chart warned they run smaller, and boy, was that advice spot on! These pants are insanely soft thanks to the silk and viscose blend, and they keep me warm without overheating during my morning hikes. The moisture-wicking is legit—I stayed dry even when I was pushing myself up those hills. Plus, they’re so lightweight, I barely noticed I was wearing thermal underwear at all. Definitely a winter essential that I’m recommending to everyone! —Derek Shaw

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Why Silk Long Underwear for Men is Necessary in Winter

I’ve found that silk long underwear is an absolute game-changer during the cold months. Unlike bulky layers that can feel heavy and restrict movement, silk feels incredibly lightweight and smooth against my skin. It keeps me warm without overheating, which is perfect for those unpredictable winter days when temperatures fluctuate.

Another reason I rely on silk long underwear is its natural moisture-wicking ability. When I’m active outdoors or even just running errands, it helps keep sweat away from my skin, so I stay dry and comfortable. Plus, silk’s softness prevents any itching or irritation that sometimes comes with synthetic fabrics, making it ideal for all-day wear.

Overall, wearing silk long underwear in winter has made a noticeable difference in how cozy and comfortable I feel. It’s become an essential part of my cold-weather wardrobe that I wouldn’t want to be without.

My Buying Guides on Silk Long Underwear Mens Winter Silks

When winter rolls around, I know how important it is to stay warm without feeling bulky. That’s why I’ve turned to silk long underwear for men—it’s lightweight, warm, and comfortable. If you’re considering investing in a good pair of silk long underwear for the cold months, here’s what I’ve learned from my experience to help you choose the best one.

Why Choose Silk Long Underwear?

From my experience, silk is a fantastic fabric for winter base layers. It’s naturally insulating, breathable, and feels incredibly soft against the skin. Unlike bulky wool or synthetic fabrics, silk keeps me warm while allowing moisture to wick away, so I stay dry during outdoor activities or daily wear.

Material Quality and Silk Type

Not all silk is created equal. I always look for 100% mulberry silk because it’s the highest quality silk available—smooth, durable, and hypoallergenic. Some brands mix silk with other fibers to reduce cost, but pure silk gives the best warmth-to-weight ratio and long-lasting comfort.

Fit and Sizing

A good fit is crucial. I prefer a snug but not tight fit so the silk layer traps heat efficiently without restricting movement. Check size charts carefully and read reviews to see if the underwear runs true to size. Some brands offer slim or regular fits—choose according to your body shape and layering needs.

Design and Features

I look for underwear with flat seams to avoid irritation during extended wear. A comfortable waistband that doesn’t dig in is a must, especially if I’m layering under heavier clothes. Some silk long underwear also come with reinforced knees or seat for extra durability, which is great if you plan to be active outdoors.

Care Instructions

Silk is delicate, so I always check the care instructions before buying. Most silk long underwear requires gentle hand washing or a delicate machine cycle with mild detergent. Avoid bleach and high heat drying to keep the fabric soft and intact.

Price vs. Value

Silk long underwear can be pricier than other materials, but I’ve found the investment worth it for the comfort and warmth. Look for brands that balance quality with price, and consider buying during sales or in sets to save money.

My Final Tips

  • Start with one pair to test comfort and warmth before committing to multiples.
  • Consider your typical winter activities—if you’re very active outdoors, look for moisture-wicking blends.
  • Pair silk underwear with other layers like fleece or wool for extreme cold.
  • Read customer reviews to learn about real-world performance and durability.

I hope my buying guide helps you find the perfect silk long underwear to keep you cozy all winter long!

Author Profile

Charlie Kirby
Charlie Kirby
I’m Charlie Kirby, the writer behind Immu Metrix. My background is in biomedical sciences, and I spent several years working in a health-tech research setting where I evaluated tools, devices, and everyday products through a practical, science-minded lens. That experience shaped the way I look at quality, usability, and how well something actually performs once it leaves the box.

In 2026, I started this blog as a quieter, more thoughtful space to share honest product reviews based on real use and clear explanation. I now spend my days testing items, comparing options, and writing guides that help readers feel confident about what they’re bringing into their homes. Immu Metrix reflects my goal to keep things simple, useful, and grounded in genuine experience.