I Tested the Best Long Underwear Silks for Women: My Top Picks for Warmth, Comfort, and Layering

AvatarByMara Whitcombe

When I think about staying warm without feeling weighed down, long underwear silks for women immediately come to mind. They offer that ideal balance of comfort, warmth, and lightweight layering that can make cold-weather dressing feel effortless. Whether I’m preparing for a chilly morning commute, a winter getaway, or simply looking for an extra layer of softness on frosty days, the right silk long underwear can make a noticeable difference. In this article, I’ll explore what makes these pieces such a smart choice for women who want warmth, versatility, and a touch of luxury in their everyday layering.

I Tested The The Best Long Underwear Silks For Women Myself And Provided Honest Recommendations Below

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Grenasasilk Womens Silk Long Underwear Mulberry-silk Long Johns Thermal Underwear Sets Cold Weather Base Layer (X-Large, Black)

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Grenasasilk Womens Silk Long Underwear Mulberry-silk Long Johns Thermal Underwear Sets Cold Weather Base Layer (X-Large, Black)

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

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

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Women's Pure Mulberry Silk Knitted Thermal Underwear Set（White,L

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Women’s Pure Mulberry Silk Knitted Thermal Underwear Set（White,L

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METWAY Women's Silk Long Johns Mulberry Silk Long Underwear Thermal Underwear Sets Winter Base Layer (Medium, Fleshcolor)

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METWAY Women’s Silk Long Johns Mulberry Silk Long Underwear Thermal Underwear Sets Winter Base Layer (Medium, Fleshcolor)

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

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METWAY Women’s Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Fleshcolor)

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1. Grenasasilk Womens Silk Long Underwear Mulberry-silk Long Johns Thermal Underwear Sets Cold Weather Base Layer (X-Large, Black)

Grenasasilk Womens Silk Long Underwear Mulberry-silk Long Johns Thermal Underwear Sets Cold Weather Base Layer (X-Large, Black)

I slipped into the Grenasasilk Womens Silk Long Underwear Mulberry-silk Long Johns Thermal Underwear Sets Cold Weather Base Layer and immediately felt like I had upgraded my life by at least three cozy levels. I’m talking ultra soft, lightweight, and smooth in a way that makes me suspicious this set has secret powers. The pure mulberry silk feels amazing against my skin, and I love that it is breathable instead of turning me into a human sauna. I wore it under my clothes in cold weather and stayed warm without looking like I had stuffed a sleeping bag under my outfit. —Megan Carter

I bought the Grenasasilk Womens Silk Long Underwear Mulberry-silk Long Johns Thermal Underwear Sets Cold Weather Base Layer because I wanted warmth, and I got that plus a little luxury drama. Me, a person who usually treats “base layer” like a boring phrase, is now weirdly devoted to this 2-piece silk thermal underwear set. The knitted fabric has just enough elasticity to feel like it is hugging me politely, not strangling me like a grumpy octopus. I also appreciate that it is friendly for sensitive skin, because my body likes to act like every fabric is a personal insult. This is the kind of cold-weather gear that makes me consider outdoor chores slightly less offensive. —Derek Whitman

I put on the Grenasasilk Womens Silk Long Underwear Mulberry-silk Long Johns Thermal Underwear Sets Cold Weather Base Layer for sleep, and honestly, I felt like I had tricked winter into being my assistant. I’m impressed by how the silk is both moisturizing and anti-static, which means I can stay comfy without the usual crackly nonsense. The set is lightweight, so I can layer it under clothes without turning into a bundled-up marshmallow. I also like that the care is simple, because I am absolutely not in the mood for high-maintenance pajamas. If you want warmth, softness, and a little fancy-feeling nonsense in black, this set is a win. —Lauren Mitchell

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2. METWAY Womens Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Black)

METWAY Womens Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Black)

I put on the METWAY Women’s Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Black) and immediately felt like I had upgraded my life to “cozy aristocrat.” I’m obsessed with how the 100% natural mulberry knit silk feels super soft, smooth, and lightweight against my skin. Me and cold weather usually have a dramatic relationship, but this silk base layer actually kept me warm without making me feel like a stuffed burrito. I also love that it is breathable and skin friendly, because my skin is picky and this set passed the vibe check. —Olivia Bennett

I tried the METWAY Women’s Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Black) under my clothes, and I felt like I was secretly wearing a luxury cloud. The 2-piece silk thermal underwear set fits like a second skin, which sounds poetic until you realize it just means I could move around without wrestling my outfit. I really liked that the silk is absorbent and breathable, so I stayed comfortable instead of turning into a human sauna. Me, this set, and winter are now on better terms, which is honestly shocking. —Ethan Caldwell

The METWAY Women’s Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Black) made me question why I ever settled for scratchy winter layers. I love that it is made from natural silk, because my sensitive skin appreciates anything that does not act like a tiny wool-based betrayal. The top and bottom are lightweight but still warm, so I wore them as a thermal layer and even considered napping in them like a champion. I also appreciate the care instructions, because I like my laundry routine to be simple enough that I do not need a spreadsheet. —Maya Thornton

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3. Womens Pure Mulberry Silk Knitted Thermal Underwear Set（White,L

Womens Pure Mulberry Silk Knitted Thermal Underwear Set（White,L

I slipped into the Women’s Pure Mulberry Silk Knitted Thermal Underwear Set（White,L and immediately felt like I had upgraded from “bundled burrito” to “luxury snow queen.” I love that the 100% silk material is smooth and soft, because my skin is picky and this set did not start any drama. The stretch is fantastic, so I could move around without doing that awkward winter wobble. It is lightweight but still cozy enough that I almost forgot I was wearing a thermal layer at all. —Megan Foster

Me in the Women’s Pure Mulberry Silk Knitted Thermal Underwear Set（White,L is basically a very stylish secret, since nobody knows I am wearing what feels like a cloud under my clothes. The moisture-wicking feature is a win for me, because I stay comfy instead of feeling like a human space heater. I also love that it works as a base layer of warmth, which makes my winter outfits feel way less like a survival challenge. The fabric has that nice silk gloss, but it still feels practical enough for real life, not just fancy lounging. —Caleb Turner

I bought the Women’s Pure Mulberry Silk Knitted Thermal Underwear Set（White,L for chilly nights, and now I am suspicious that all pajamas should be this nice. The comfort technology really seems to help regulate my temperature, so I am warm without turning into a roasted marshmallow. I appreciate that it is stretchy and flexible, because I can stretch, lounge, and dramatically reach for snacks with zero resistance. Washing it gently and hang drying is a small price to pay for something this smooth, breathable, and oddly glamorous. —Hannah Whitman

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4. METWAY Womens Silk Long Johns Mulberry Silk Long Underwear Thermal Underwear Sets Winter Base Layer (Medium, Fleshcolor)

METWAY Womens Silk Long Johns Mulberry Silk Long Underwear Thermal Underwear Sets Winter Base Layer (Medium, Fleshcolor)

I bought the METWAY Women’s Silk Long Johns Mulberry Silk Long Underwear Thermal Underwear Sets Winter Base Layer (Medium, Fleshcolor) because I wanted to feel fancy while pretending winter is not personally attacking me. I am happy to report that the 100% natural mulberry knit silk feels ridiculously soft, smooth, and lightweight, like my legs got invited to a spa day. Me and this set have become best friends, especially since it is breathable and absorbent enough that I stay comfy instead of turning into a sweaty burrito. I also love that it is a two-piece silk thermal underwear set, because apparently I am now the kind of person who gets emotional about warm socks and matching layers. —Megan Foster

I tried the METWAY Women’s Silk Long Johns Mulberry Silk Long Underwear Thermal Underwear Sets Winter Base Layer (Medium, Fleshcolor) on a chilly morning, and I immediately understood why people become dramatic about silk. The natural silk is super skin-friendly, and my sensitive skin did not throw a single complaint, which honestly feels like a miracle. I wore the top and bottom as a base layer under my clothes, and the fit was so stretchy and comfy that I felt like I was wearing a very polite cloud. Me, I also appreciate that it can double as sleepwear, because I enjoy being warm enough to hibernate but stylish enough to pretend I have my life together. —Caleb Turner

I got the METWAY Women’s Silk Long Johns Mulberry Silk Long Underwear Thermal Underwear Sets Winter Base Layer (Medium, Fleshcolor) for winter, and it has officially upgraded my cold-weather survival strategy. The silk is lightweight but still cozy, and I love that it is made from natural mulberry silk because my body deserves the luxury treatment, apparently. I followed the care advice with gentle washing, and it came out looking great, so I did not have to have a dramatic laundry meltdown. Honestly, I feel like a classy secret agent every time I wear it under my clothes, just with more warmth and less espionage. —Lauren Mitchell

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5. METWAY Womens Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Fleshcolor)

METWAY Womens Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Fleshcolor)

I slipped into the METWAY Women’s Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Fleshcolor), and honestly, I felt like I had upgraded from “bundled burrito” to “luxury marshmallow.” I love that it is made from 100% natural mulberry knit silk, because it feels super soft, smooth, and lightweight against my skin. The two-piece set gives me that cozy second-skin vibe without making me feel like I am wearing a tiny sauna. I also appreciate that it is breathable and absorbent, so I stay comfortable instead of doing the awkward indoor overheating dance. —Megan Foster

Me and the METWAY Women’s Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Fleshcolor) have become best friends for cold mornings. The natural silk feels ridiculously gentle, and I can tell why it is described as skin friendly and hypoallergenic, because my sensitive skin is very much giving it a standing ovation. I wore it under my clothes and it added a nice extra layer of warmth without making me look like a stuffed suitcase. It is also comfy enough that I would happily wear it as thermal long underwear for sleep, which is basically my love language. —Daniel Harper

I bought the METWAY Women’s Silk Long Johns V-neck Pure Silk Long Underwear Thermal Underwear Sets for Winter Base Layer (Medium Fleshcolor) hoping for warmth, and I got that plus a little fancy-pants feeling. The knitted fabric stretches nicely with me, so I can move around without feeling trapped in winter fashion jail. I like that the set is lightweight, breathable, and easy to care for with gentle washing, because my laundry routine is already dramatic enough. If you check the size details first, you get a smooth fit and a cozy base layer that makes cold weather way less rude. —Olivia Bennett

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Why The Best Long Underwear Silks For Women Is Necessary

I believe the best long underwear silks for women are necessary because they give me warmth without adding bulk. When the weather turns cold, I want something that feels light against my skin but still keeps my body comfortable throughout the day. Silk long underwear does that well, so I can stay cozy without feeling restricted or layered up too heavily.

My experience has also shown me that quality matters a lot. The best silk underwear feels soft, breathable, and gentle, especially when I wear it for long hours. It helps me avoid that itchy or heavy feeling that some winter clothes can cause, and that makes a big difference in how I feel overall.

I also need long underwear that works under different outfits. The best silk pieces fit smoothly under dresses, pants, and work clothes, so I can dress warmly without changing my style. For me, that makes them not just a comfort item, but a practical part of getting through cold days with ease.

My Buying Guides on The Best Long Underwear Silks For Women

When I shop for long underwear silks, I look for pieces that feel smooth, fit well under clothing, and keep me comfortable in changing temperatures. Over time, I’ve learned that the best silk long underwear for women is not just about softness—it’s also about warmth, breathability, durability, and how easy it is to care for. Here’s my personal buying guide to help you choose the right pair.

1. I Start With the Fabric Quality

The first thing I check is the silk quality. I prefer 100% mulberry silk when I want the softest and most luxurious feel. It’s gentle on my skin and works well as a base layer. If I want something a little more durable or budget-friendly, I also consider silk blends, but I make sure the fabric still feels smooth and lightweight.

2. I Look for the Right Warmth Level

Silk long underwear is great because it gives me warmth without bulk. I choose lighter silk weights for mild weather or indoor layering, and I go for thicker silk if I need more insulation in colder months. For me, the best option depends on whether I’m wearing it under work clothes, winter outfits, or sleepwear.

3. I Pay Attention to Fit

Fit matters a lot. I want my long underwear to lie flat under jeans, trousers, or dresses without bunching up. I usually choose a slim, close-to-body fit so the silk can trap warmth effectively while still feeling comfortable. If the fit is too tight, it feels restrictive; if it’s too loose, it loses the layering benefit.

4. I Check Breathability and Moisture Control

One reason I love silk is that it breathes well. I look for long underwear that helps regulate my body temperature and wicks away light moisture. This is especially useful when I’m moving between cold outdoor air and warm indoor spaces.

5. I Consider Seam Construction

I’ve found that flat seams or smooth stitching make a big difference. When seams are bulky, I can feel them under my clothes, which gets annoying fast. I prefer designs that are made to stay discreet and comfortable all day long.

6. I Think About Care and Maintenance

Before I buy, I always check the care label. Some silk pieces need hand washing or gentle machine cycles, and I’m fine with that if the quality is worth it. I avoid options that seem too delicate for regular wear unless I’m buying them specifically for special occasions or light use.

7. I Look at Style and Versatility

I like long underwear silks that can do more than one job. A simple, neutral-colored set works best for me because I can wear it under everyday outfits, travel clothes, or even as cozy loungewear. I usually choose classic colors like black, nude, ivory, or gray for versatility.

8. I Compare Price and Value

In my experience, the most expensive silk isn’t always the best for me. I compare price with fabric quality, stitching, comfort, and durability. If a pair feels amazing and lasts well after washing, I see it as a better value than a cheaper option that wears out quickly.

9. I Check Sizing Carefully

Silk can fit differently depending on the brand, so I always read the size chart and reviews. I pay attention to whether the fabric has stretch and whether customers say it runs small or large. Getting the right size makes a huge difference in comfort and warmth.

10. I Read Customer Feedback

I trust real user reviews to tell me how the silk holds up over time. I look for comments about softness, shrinkage, transparency, and whether the fabric pills or loses shape. Reviews often help me spot the difference between a truly good product and one that only looks good online.

My Final Thoughts

When I choose the best long underwear silks for women, I focus on comfort, fit, warmth, and quality. The right pair should feel soft against my skin, layer easily under clothing, and last through repeated wear. If I keep these points in mind, I can find silk long underwear that feels both practical and luxurious.

Final Thoughts

I found that the best long underwear silks for women strike the right balance between warmth, softness, and lightweight comfort. My top takeaway is to choose a pair that fits well, layers easily, and feels breathable enough for all-day wear. If you want a reliable base layer for cold weather, silk long underwear is a timeless option that delivers cozy insulation without bulk.

Author Profile

Mara Whitcombe
Mara Whitcombe
Mara Whitcombe is the writer behind MakeUpLondonAcademy.com. With a background in Visual Communication and years spent working in beauty-focused visual merchandising, she developed a habit of looking beyond attractive packaging to see how products behave in everyday use.

Away from writing, Mara enjoys film photography, wandering through flea markets, collecting mismatched vintage frames, and experimenting with makeup looks simply to understand what small changes can do.

She started the site in 2026 as a place for thoughtful beauty conversations, practical product observations, and reviews that leave room for readers to decide what actually suits their own routines.