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Your cart is empty.Designed for high energy outdoor adventures, our Thermasilk Series is engineered to stretch and move with you for your various active lifestyles. From climbing up to the snowiest peaks to early morning runs in the city, these garments are enhanced with ClimaSense thermal regulation technology to enhance your comfort. Terramar's Thermasilk line has high loft grid channels to create an ideal microclimate that efficiently traps air and effectively allows circulation. The grid construction was created to trap air for added warmth between layers and transport moisture. Each product has a smooth face fleeced back, easy layering, sustainable, quick drying, moisture management and UPF protection.
Schmockle
Reviewed in the United States on March 6, 2025
I live in these all winter. I am short, round and cold. These provide insulation and warmth without making my pants feel too tight. In the past, my silk long underwear has been easy to rip. These are a better quality and have lasted well all winter.
Customer
Reviewed in the United States on March 3, 2025
So comfortable and easy to wear under jeans and slacks and not feel bulky. Very warm and feels nice to wear.
Barb Marcum
Reviewed in the United States on February 8, 2025
Excellent product. I can even where them under tights. I'm 64 years old, 5'5", 150 pounds.I own both size medium and size large. The size medium is tight and eventually ripped a great deal in the crotch area. The size large is loose but I don't think it will eventually rip.
Captain Marvelous
Reviewed in the United States on January 5, 2025
Great lightweight and easily wearable product under normal and lighter clothing. Provides light warmth under clothing that would be awkward or too hot with normal long underwear. Silk is smooth and clothing glides over it. Keeps clothing a bit fresher between washes when traveling and reduces scratchiness of wool and similar clothing.
W.S.
Reviewed in the United States on January 27, 2025
Good price and durable silk long underwear.
Good visibility. Highly recommen
Reviewed in Singapore on February 15, 2024
Very comfortable
Palis
Reviewed in Canada on January 3, 2024
These got a run in them within the month I bought them. They could use a little more stretch to the fabric.I would size up to avoid them running.
nickle tan
Reviewed in Singapore on July 30, 2023
Material is unexpectedly thin
Bernadet
Reviewed in Canada on March 11, 2021
Absolutely wonderful. They are so soft and so light they go under my jeans without adding any bulk. I could tell that I was warmer wearing this then without. I am extremely happy with my purchase.
KadyOne
Reviewed in the United States on February 11, 2021
Let me be upfront with this first opinion: "Base layer" silk underwear is a crock. It's also a rip-off, IMO. $50-60 for something that I'm honestly afraid to wash because I'd expect them to dissolve in the water. But since I can't buy any others this time of year, apparently, I went ahead and gave in.I use silk long-johns to sleep in. My Reynaud's has crept up over the years and now involves my lower legs as well as my feet. Even using an electric blanket year-round (with my AC set no higher than 70 because my face is always hot ... an uncommon but annoying and uncomfortable flip side to Reynaud's, I've learned), my feet and legs are usually cold in bed.These did help keep my lower body warmer, but how long they will hold up? How long before a seam tears out, because the fabric is so thin and delicate?I really miss what I used to be able to buy: heavy silk long-johns, not polyester, not fleece, not cotton on the inside. Just well-made, heavy silk LJ, that don't cost a fortune. Used to at least be able to buy at a good discount after winter, but don't even find those deals at 3D stores or their online sites. And most that look/sound heavier, almost always come as a set with a long-sleeved top ... which I don't need and don't want to pay for.One final note: I recently also purchased a pair of Lands End LJ, sold here on Amazon. I ordered according to the table of measurements. They are about 2 sizes too big. When I wanted to exchange, none will be available for almost a YEAR!!! Can't return, can't exchange. Couldn't buy directly from the company either.Because of the size disparity, I ordered these the size I learned I needed in the other LJ (Lands End). They fit just about right, though they are a little long in the crotch and the waist is just a tiny bit tight. I am about 5'7", 185 pounds these days, and a bit short-waisted. I wear a 16 or 18 jeans or slacks, the 16 if there is any stretch in the fabric.I'm glad I've now got one pair for bed again but I won't buy another unless on sale. I'm used to paying a premium for almost everything sold by Amazon. I consider it like going to a convenience store (7-11, for example) for milk or feminine hygiene products needed in a pinch; you pay for that convenience. But the price for any and all of these so-called "base layer" silk long-johns really does seem exhorbitant.
Macky
Reviewed in the United States on August 13, 2019
Purchased these as base layer for a trip to Northern India and the Himalayas. Worn them for a bit around the house and they are warm! The material is thin and they likely should be hand washed and line dried. However, they appear to be the same weight as others purchased from Land's End, which have lasted a good long time. Thin is good, as they weigh next to nothing and take up little room, perfect for a long trip with carry on luggage only.
Anne Edwards
Reviewed in Australia on November 21, 2019
I have used these thermals before. They are easy to wear and provide good warm.The pants are quick dry a great asset when travelling.
CnB_SWFL
Reviewed in the United States on December 31, 2018
For size reference, I’m 5’3”, generally wear Small / size 2 or 4 depending on brand, style, etc. Bought a S in this and it fit fine. Definitely not ultra snug, rather pretty loose. At first I was really disappointed, thinking that as a base layer it was supposed to be like 2nd skin, and considered returning it but didn’t have time before leaving for a trip in a couple days. In the end, I’m happy about the fit. I think an XS would’ve felt too constrictive and the waistband definitely too uncomfortably snug. I had no trouble slipping on some jeans (regular/straight fit, not skinny leg or anything) or some rather thick/heavy-weight leggings over these - although I had to do a little tugging and pulling on these bottoms when trying to slide the leggings on to get the bottoms to stay in the proper position.The material is extremely thin, like hosiery. I wondered how it could possibly do its job of keeping me warm but it did its job to the fullest. Plus although it may have the appearance and thinness of hosiery, fortunately it FEELS nothing like hosiery. I wouldn’t have been able to tolerate that feel. But these bottoms are wicked soft and smooth, not at all scratchy or having that wire scouring-pad feel of hosiery. I also really liked that this was thin enough to take up very little space for packing as we were trying to travel light.I’m really glad I decided to keep it. The bottoms turned out to be fantastic for a cold weather vacation, worn as a base layer. I was happy as a clam wearing them almost every day during a 9-day trip in 40-45 F temps. I’ve always lived in balmy FL and have no clue how to dress properly for cold weather, but staying warm was a big deal for me to be able to enjoy the trip so I was really putting a lot of confidence in this article of clothing and it actually came through! It’s only a base layer - and a lightweight one at that - so to reiterate, naturally I had jeans or heavy leggings over it but honestly I think it was the base layer that made all the difference in being able to stay warm. I’m thrilled that it worked out.FYI I ordered the matching top (Terramar Women's Thermasilk Pointelle Scoop neck) with the same satisfactory result, as well as a MIDweight base layer set (32Degrees Women's Heat Thermal top and bottoms) for the slightly cooler days (30-40 F).
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