10 Best Long Underwear For Women 2025 in the United States

The Cuddl Duds Thermal Underwear for Women is designed to keep you warm during cold weather, featuring a brushed fleece inside for extra coziness. The set includes a thermal shirt top and leggings pants, both made from 93% Polyester and 7% Spandex, which offers a good balance of comfort and stretch. The spandex stretch ensures flexibility and ease of movement, making this set suitable for various activities.

Additionally, the densely knit fabric provides 50+ UV protection, adding an extra layer of safety from harmful rays. The thumbhole sleeve top and modern rise leggings contribute to a comfortable fit that stays in place. However, the heavyweight fabric may not be the best choice for milder temperatures as it could feel bulky. The moisture-wicking feature helps manage sweat by absorbing and evaporating moisture, maintaining dryness. Yet, there is no specific mention of odor resistance, which is a potential downside for those looking for prolonged wear without the smell.

The seams and construction appear durable, enhancing the longevity of the product. This thermal set is versatile enough to be worn as a base layer or on its own, making it ideal for both outdoor activities and lounging at home. Machine washable for easy care, it combines practicality with comfort effectively.

The WEERTI Thermal Underwear for Women is designed to offer a robust solution for cold weather layering. Made from 92% soft polyester with 8% spandex and a cozy fleece lining, this set promises comfort and warmth. The material choice provides a soft feel and elastic flexibility, ensuring ease of movement, which is great for active wearers. A notable strength is its strong moisture-wicking capability, intended to keep you dry by efficiently moving sweat away from the body. This function, combined with the fabric’s breathability, makes it a suitable choice for those who require a base layer that performs well under varying activity levels.

The fit is described as snug, working as a second skin to minimize heat loss and prevent bunching, which is beneficial for maintaining warmth and comfort. However, the snug fit might not be ideal for everyone, especially those who prefer a looser fit. The seamless construction aims to reduce skin irritation, enhancing comfort during long wear periods.

While the design incorporates both functionality and fashion, it might not meet everyone's style preferences. Additionally, being imported and machine washable is a plus for those looking for low-maintenance care. It seems suitable for women looking for flexible, comfortable, and warm base layers for casual wear or low to moderate activity levels in cold conditions. Individuals with specific needs for odor control or a preference for looser wear may need to explore further options.

The Merino Wool Base Layer Women Pants are a versatile option for those seeking comfortable and functional long underwear. Made from 100% superfine 17.5 micron Merino wool, these pants promise softness and itch-free wear, which is a significant advantage for sensitive skin. The product offers midweight insulation at 250 g/m², making it suitable for moderate to cold temperatures. This midweight option balances warmth and breathability well, but for extremely cold conditions, you might prefer the heavyweight version (320 g/m²). The inclusion of Merino wool hiking socks is a nice bonus, adding value to the purchase.

The pants excel in moisture-wicking and odor resistance, thanks to the natural properties of Merino wool, keeping you dry and fresh during active use. The pull-on closure design makes them easy to wear, and they are machine washable, though hand washing and air drying are recommended for longevity. While the construction and fit appear to be well-designed for daily comfort, those preferring a more snug or stretchy fit might need to consider other options, as pure Merino wool lacks the elasticity of synthetic blends. The product is made in China, which might be a consideration for those looking for locally manufactured goods.

The need to take extra care while washing is also a minor inconvenience. However, the Merino.tech Promise provides some reassurance for customer satisfaction. These pants are ideal for outdoor enthusiasts and anyone in need of reliable thermal underwear for varying weather conditions.