10 Best silk thermals women 2025 in the United States

The Merino.tech Merino Wool Base Layer Women Set offers a blend of comfort and functionality, making it a versatile choice for those looking for thermals. Made from 100% superfine merino wool, the set includes a heavyweight top, leggings, and even a pair of merino wool hiking socks, adding extra value. The material quality is top-notch, ensuring a soft, itch-free experience that can be worn all day. The natural moisture-wicking and odor-resistant properties of merino wool keep you dry and fresh, a significant advantage for active users or those wearing the set for extended periods.

The set is available in different weights (lightweight, midweight, and heavyweight), catering to various needs depending on the weather and activity level. However, the heavyweight version, weighing 320 g/m², may feel a bit bulky for some users but is excellent for extremely cold conditions. The fit is designed to prevent rubbing, overheating, or bunching, which enhances comfort. Seam construction appears well-made, reducing the chances of chafing or discomfort. Care instructions recommend hand washing and laying flat to dry, which might be inconvenient for those used to machine washing.

Additionally, the set is imported from China, which may be a consideration for those preferring domestically produced goods. This Merino.tech set is suitable for outdoor enthusiasts, those in colder climates, or anyone in need of high-quality thermal wear. The packaging is appealing, making it a great gift option as well.

The Grenasasilk Women's Silk Long Underwear is made from 100% natural mulberry silk, which is known for being exceptionally soft, lightweight, and breathable. This makes it an excellent option for those who prioritize comfort and have sensitive or allergy-prone skin. Mulberry silk is hypoallergenic and has anti-static properties, contributing to its skin-friendly nature.

The product comprises a top and bottom set, designed to fit like a second skin and provide an extra layer of warmth in cold weather or serve as comfortable sleepwear. The material quality is top-notch, ensuring both comfort and durability. The knit fabric’s elasticity ensures a snug but comfortable fit, adapting well to various body shapes without feeling restrictive. However, sizes should be checked carefully before purchase to ensure the right fit and avoid the inconvenience of returns. The seam construction is sturdy, which should help in maintaining the garment's shape and integrity over time.

Care instructions are straightforward: the set can be machine-washed on a gentle cycle or hand-washed in normal temperature water and should be air-dried. Avoiding bleach is recommended to maintain the fabric's quality. One potential drawback is that silk, being a delicate fabric, may require more attentive care compared to synthetic materials. Additionally, as imported silk underwear, it may come at a higher price point. Ideal for women seeking high-quality, comfortable, and skin-friendly thermal wear, this product stands out but requires mindful upkeep.

The Terramar Women's Thermasilk Pointelle Pant in Natural and Medium size offers a lot of comfort and warmth, being made from 100% filament silk. The material quality is top-notch, ensuring that the pants are both extra soft and ultra-comfortable. Weighing only 1 pound, they are light and easy to wear, making them perfect for layering during colder months. The fit is enhanced by a comfort stretch waistband which keeps the pants snug against your body without feeling restrictive. However, it's important to refer to the size chart to ensure a proper fit as sizing can sometimes vary.

The seam construction appears to be well-crafted, further contributing to the comfort and durability of the pants. These pants are easy to take care of, with machine wash instructions, saving you time and effort. The additional feature of UPF 50+ protection is beneficial for outdoor use, offering some protection against the sun. Terramar's Climasense 1.0 technology is another highlight, helping to regulate temperature and keep you dry and warm in various conditions. The main drawback might be the limited variety of colors and sizes available, depending on stock.

These thermals are well-suited for anyone looking for high-quality, comfortable, and functional silk thermal pants.