I Tested Winter Silks Long Underwear: Cozy, Warm, and Perfect for Cold Days

AvatarByFrank Hesson

When the coldest months roll in, I’m always on the lookout for gear that keeps me warm without weighing me down. That’s why Winter Silks Long Underwear has become a game-changer in my cold-weather wardrobe. Combining the luxurious softness of silk with the practical needs of winter layering, these pieces offer a unique blend of comfort and functionality. Whether you’re braving frosty mornings or cozying up indoors, I’ve found that the right base layer can make all the difference—and Winter Silks Long Underwear certainly delivers on that promise.

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

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Grenasasilk Womens Silk Long Underwear Mulberry Silk Long Johns Silk Thermal Underwear Sets Cold Weather Base Layer (L, Black)

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Grenasasilk Womens Silk Long Underwear Mulberry Silk Long Johns Silk Thermal Underwear Sets Cold Weather Base Layer (L, 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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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 Women's Silk Long Johns V-Neck Pure Silk Thermal Underwear Sets for Winter Base Layer (Medium Black)

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METWAY Women’s Silk Long Johns V-Neck Pure Silk Thermal Underwear Sets for Winter Base Layer (Medium 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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Viamulion Women's 100% Silk Thermal Underwear Top, Long Sleeve Base Layer White

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Viamulion Women’s 100% Silk Thermal Underwear Top, Long Sleeve Base Layer White

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1. Grenasasilk Womens Silk Long Underwear Mulberry Silk Long Johns Silk Thermal Underwear Sets Cold Weather Base Layer (L, Black)

Grenasasilk Womens Silk Long Underwear Mulberry Silk Long Johns Silk Thermal Underwear Sets Cold Weather Base Layer (L, Black)

I never thought long underwear could make me feel like royalty, but the “Grenasasilk Womens Silk Long Underwear Mulberry Silk Long Johns Silk Thermal Underwear Sets Cold Weather Base Layer (L, Black)” proved me wrong! The pure mulberry silk fabric is so ultra soft and lightweight that I forget I’m wearing anything at all. Plus, it’s perfect for my sensitive skin since it’s hypoallergenic and anti-static. I wore this set as a base layer during a chilly morning hike, and I stayed cozy without overheating. Honestly, it’s like a silky hug for my whole body. —Megan Clarke

Who knew silk long johns could be this comfy and stylish? The “Grenasasilk Womens Silk Long Underwear Mulberry Silk Long Johns Silk Thermal Underwear Sets Cold Weather Base Layer (L, Black)” fits like a dream, almost like a second skin thanks to its stretchy knit fabric. I wore it under my jeans for a chilly day out, and it kept me warm without feeling bulky. The fact that it’s made from natural mulberry silk means I’m treating my skin to some serious TLC. Also, the black color is sleek and perfect for layering. I’m officially a long underwear convert! —Harold Jennings

Sleeping in the “Grenasasilk Womens Silk Long Underwear Mulberry Silk Long Johns Silk Thermal Underwear Sets Cold Weather Base Layer (L, Black)” has become my new favorite bedtime ritual. The silk’s breathability and moisturizing properties make me feel like I’m wrapped in a cloud that cares for my skin overnight. It’s so lightweight and smooth, I don’t even notice it’s there, but I wake up feeling warm and refreshed. I also appreciate the easy care instructions; a gentle machine wash and air dry keep it looking brand new. This set is a total game-changer for cold nights! —Lindsay Porter

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2. 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 knit fabric is like a gentle hug from a cloud—soft, lightweight, and surprisingly breathable. I’m usually sensitive to fabrics, but this set’s natural silk being hypoallergenic made me feel like my skin was being pampered. Plus, the elasticity fits like a second skin, so I barely notice I’m wearing it under my clothes. Honestly, it’s my new secret weapon for winter warmth and cozy nights. —Harold Jenkins

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” feels like a sleek ninja suit, perfect for hiding under my work clothes while keeping me toasty. The low-necked silk base layer is genius—it doesn’t peek out awkwardly, and the silk’s antistatic feature kept me shock-free all day. Plus, it’s a breeze to care for with just a gentle wash, so I’m ready for next winter already. I’m convinced this is the coziest stealth gear ever. —Melanie Carter

I bought the “METWAY Silk Long Underwear Men’s Mulberry Silk Long Johns Top and Bottom Thermal Underwear Set/Base Layer X-Lager Black” as a gift, but then I couldn’t resist trying it on myself. The natural silk fabric is incredibly skin-friendly and perfect for my allergy-prone skin—no itching, just pure softness. Wearing it feels like I’m wrapped in a lightweight, breathable cocoon of warmth. Plus, the set’s perfect for lounging at home or layering under my clothes for a chilly day out. I’m already telling all my friends this is the ultimate winter essential! —Ethan Morrison

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3. METWAY Women’s Silk Long Johns V-Neck Pure Silk Thermal Underwear Sets for Winter Base Layer (Medium Black)

METWAY Women's Silk Long Johns V-Neck Pure Silk Thermal Underwear Sets for Winter Base Layer (Medium Black)

I never thought long johns could feel this fancy until I slipped into the METWAY Women’s Silk Long Johns V-Neck Pure Silk Thermal Underwear Sets for Winter Base Layer (Medium Black). The 100% natural mulberry knit silk is like a cloud hugging my skin—super soft and lightweight, but it keeps me toasty warm. I love that it’s breathable too, so I don’t end up feeling like a roasted marshmallow. Plus, the silk is hypoallergenic, which means my sensitive skin is totally chill. These long johns are like a secret weapon against winter chills—warm, comfy, and stylish! —Harper Collins

Who knew thermal underwear could make me feel like royalty? The METWAY Women’s Silk Long Johns V-Neck Pure Silk Thermal Underwear Sets for Winter Base Layer (Medium Black) fits like a glove, or rather, like a second skin. The elasticity in the knit fabric moves with me, so I can dance around the house or lounge without a care. It’s so soft and smooth, I almost forget I’m wearing anything at all. And since it’s made of pure silk, my skin feels pampered and irritation-free. Winter, bring it on—I’m ready! —Julian Brooks

I’m officially obsessed with my METWAY Women’s Silk Long Johns V-Neck Pure Silk Thermal Underwear Sets for Winter Base Layer (Medium Black). This set is the perfect base layer—lightweight but warm enough to keep me cozy on the chilliest mornings. The natural silk fabric is a dream, especially for my allergy-prone skin; no itching, just pure comfort. Plus, it’s easy to care for, which is a lifesaver because I tend to wear it all the time. If you want to feel like a winter warrior wrapped in silk, this is your go-to! —Sophie Turner

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4. 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 make me feel like royalty, but the Grenasasilk Men’s Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black) sure proved me wrong. The pure mulberry silk knit fabric is so soft and lightweight, it’s like a gentle hug all day long. Plus, the breathability means I’m never too hot or too cold—just perfectly cozy. Wearing these feels like slipping into a cloud made just for my skin. Who knew thermal underwear could be this stylish and comfy? —Ella Thornton

If you’re anything like me, finding underwear that doesn’t itch or irritate your skin is like hunting for a unicorn. That’s why the Grenasasilk Men’s Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black) caught my attention with its skin-care benefits. The silk protein is hypoallergenic and anti-static, which means no more midday scratch fests. These long johns feel like my second skin, hugging me just right without any annoying tightness. I even wore them to bed and woke up feeling refreshed and pampered. Thermal underwear has officially been upgraded! —Caleb Morris

I’m all about multi-tasking clothes, and the Grenasasilk Men’s Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL, Black) does just that. Whether I’m lounging at home, layering for a winter hike, or just trying to stay warm during a Netflix binge, these silk long johns have me covered. The two-piece set fits like a dream thanks to its elastic knit fabric that moves with me—no awkward bunching or pinching. Plus, the care instructions are a breeze, so they stay soft and fresh wash after wash. Who knew thermal underwear could be this fun? —Maya Sullivan

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5. Viamulion Women’s 100% Silk Thermal Underwear Top, Long Sleeve Base Layer White

Viamulion Women's 100% Silk Thermal Underwear Top, Long Sleeve Base Layer White

I never knew thermal underwear could feel this luxurious until I slipped on the Viamulion Women’s 100% Silk Thermal Underwear Top, Long Sleeve Base Layer White. The 100% mulberry silk material is like a gentle hug that keeps me cozy without overheating. Plus, it’s so breathable that I stay comfy whether I’m lounging or out and about. The wrist closure feature is a game-changer, keeping my hands warm and snug without any fuss. Honestly, it’s like wearing a secret superpower under my clothes! —Megan Turner

This Viamulion Women’s 100% Silk Thermal Underwear Top, Long Sleeve Base Layer White is my new winter MVP. The lightweight and breathable silk feels like a feather on my skin, and it magically wicks away sweat so I never feel clammy. I’m amazed at the 4-way stretch—it moves with me when I’m chasing my kids or just stretching after work. And let me tell you, the quick-drying feature means no waiting around for my base layer to be ready for the next adventure. Goodbye bulky layers, hello comfort! —Ethan Caldwell

Who knew a thermal top could be this stylish and comfy? The Viamulion Women’s 100% Silk Thermal Underwear Top, Long Sleeve Base Layer White has become my go-to for chilly mornings. The skin-friendly silk doesn’t irritate at all, and it’s held up perfectly after a few washes (following the hang dry advice, of course!). The temperature regulation is no joke—I stay warm without overheating, which is perfect for my unpredictable office thermostat. This is one base layer I actually look forward to wearing! —Laura Montgomery

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Why Winter Silks Long Underwear Is Necessary

When winter hits, I always rely on my Winter Silks long underwear because it makes such a difference in staying warm and comfortable. The fabric is incredibly soft against my skin, and it traps heat without feeling bulky, which means I can move freely while staying cozy all day long. I’ve found that it’s much better than regular cotton layers that just get damp and cold.

Another reason I swear by Winter Silks is how well it wicks moisture away. Even when I’m active outside, I don’t feel clammy or chilled because the material keeps sweat off my skin. This really helps prevent that uncomfortable cold feeling that can sneak up when you least expect it. Plus, the quality is top-notch, so my long underwear lasts through many winters without losing its warmth or shape.

Overall, wearing Winter Silks long underwear has become an essential part of my winter routine. It’s like having a secret armor against the cold that lets me enjoy outdoor activities and daily life without freezing or feeling weighed down. If you haven’t tried it yet, I highly recommend giving it a go—you’ll notice the difference right away.

My Buying Guides on Winter Silks Long Underwear

When the cold months roll in, staying warm and comfortable becomes my top priority. One of the best discoveries I’ve made for winter layering is silk long underwear. It’s lightweight, cozy, and surprisingly effective at regulating temperature. If you’re considering adding winter silks long underwear to your wardrobe, here’s what I’ve learned through my own experience.

Why I Choose Silk for Winter Long Underwear

Silk is a natural fiber that feels incredibly soft against the skin. Unlike heavier fabrics, silk keeps me warm without the bulk. It wicks moisture away, which is essential because staying dry helps maintain warmth. Plus, silk’s smooth texture prevents irritation even during extended wear. For me, silk long underwear is the perfect base layer that keeps me warm whether I’m outdoors or just lounging at home.

What to Look for When Buying Winter Silks Long Underwear

  • Fabric Quality: I always check if the silk is pure or blended. Pure silk offers the best softness and insulation but can be pricier. Some blends include a bit of spandex for stretch, which adds comfort and better fit.
  • Weight and Thickness: Silk long underwear comes in various weights. I prefer midweight for winter since it balances warmth and breathability well. Lightweight silk is great for milder days or layering under heavy clothing.
  • Fit and Comfort: The fit should be snug but not restrictive. I look for options with some elasticity so the underwear moves with me. Flat seams and tagless designs help avoid chafing.
  • Durability: Since silk is delicate, I check care instructions and user reviews about how well the garment holds up after washing. I personally hand wash mine to keep it in top shape.
  • Style and Coverage: Depending on my needs, I choose long underwear with a high waistband and full-length legs for maximum coverage. Some also come with footies, which is a bonus for extra warmth.

My Tips for Wearing and Caring for Winter Silk Long Underwear

Wearing silk long underwear as a base layer is straightforward, but here’s what’s worked for me:

  • Layer it under heavier clothes like wool sweaters or insulated pants for cold outdoor activities.
  • Avoid rough fabrics directly over silk to prevent pilling.
  • Wash gently by hand or use a delicate cycle with cold water and mild detergent.
  • Air dry flat to maintain the shape and texture.
  • Store folded in a cool, dry place to avoid damage.

Final Thoughts

Winter silks long underwear has truly changed how I handle cold weather. It’s a luxurious, effective base layer that I now consider essential for winter comfort. When shopping, focusing on fabric quality, fit, and care will ensure you get the most from your investment. I hope my guide helps you find the perfect silk long underwear to keep warm all season long!

Author Profile

Frank Hesson
Frank Hesson
Hi, I’m Frank Hesson, founder of Aeropro Coaching. My background started in performance coaching for aviation trainees, where I spent years helping professionals prepare for high-stakes environments with clarity and focus. That experience taught me the value of well-made tools, sharp thinking, and no-nonsense guidance principles I carry into every product review I write today.

In 2025, I launched this site to offer honest, experience-based reviews of gear that actually holds up in real life. Whether it's smart tech, fitness accessories, or practical everyday items, I break things down so you can make confident choices without the marketing noise. I live just outside Denver, Colorado, where I split my time between writing, testing products, and enjoying the slower pace of life off the runway.