Top Thermal Wear Brands for Ultimate Comfort and Warmth

As temperatures drop, staying warm and comfortable becomes a priority, making the choice of thermal wear essential for winter survival. Today's market offers an impressive variety of thermal brands that cater to all tastes, needs, and budgets, ensuring everyone can find their perfect match. From advanced fabrics designed to retain heat to stylish designs that maintain a sleek silhouette, the options out there are endless and intriguing. Discover some of the best brands that stand out in the thermal wear industry below.

Illustration of thermal wear

Best brands of thermal wear in 2025

Uniqlo

Uniqlo stands out as a leading producer of thermal wear, renowned for its innovative and high-quality products such as HEATTECH, which converts moisture into heat and retains it, making it a staple in cold weather. Since its introduction, HEATTECH has seen significant growth, with sales jumping from 1.5 million units in 2003 to over 130 million units across 250 items by 2012. This technology, developed in collaboration with Toray Industries, has been a key factor in Uniqlo's success, contributing to its global expansion and strong market presence. Uniqlo's thermal wear is designed for everyday use, offering comfort, thinness, and lightweight warmth, making it a favorite among consumers. The brand's commitment to innovation and a customer-centric approach has helped it achieve a market share of 14.2% in 2023, solidifying its position in the global apparel market.

Patagonia

Patagonia is a leading brand in the thermal underwear market, known for its high-quality, environmentally friendly products. The global thermal underwear market, which includes brands like Patagonia, is expected to grow at a CAGR of 3.71% from 2023 to 2031, reaching a market size of USD 11,036.07 million by 2031. In the U.S. market, thermal underwear is projected to reach USD 1130.3 million by 2030, with a CAGR of 6.4%, driven by factors such as the increasing number of working women and the expansion of product portfolios by key manufacturers. Patagonia's innovative use of materials and styles contributes to the market's growth, especially in regions like North America, where the brand has a strong presence. The brand's commitment to sustainability and quality aligns with consumer preferences, further boosting its market share. For more details on their products, visit their Patagonia thermal underwear page.

Smartwool

Smartwool is a leading brand in the thermal underwear market, known for its high-quality merino wool products that offer exceptional comfort, sustainability, and performance. Since its inception, the company has been a key player, holding about 28% of the market share along with other major manufacturers like Under Armour. Smartwool's products, including socks and base layers, are designed for various activities such as skiing, hiking, and everyday wear, utilizing innovative technologies like Shred Shield and Closed Toe Box to enhance durability and comfort. The brand is committed to environmental sustainability, using ZQ certified merino wool and transitioning to recycled nylon. Smartwool's products are highly regarded for their fit, comfort, and eco-friendly manufacturing processes. For more information, visit their official website.

Icebreaker

Icebreaker is renowned as one of the best producers of thermal wear, specializing in high-quality, premium Merino wool clothing. Based in New Zealand, the company has made the largest purchase of Merino wool in New Zealand's history, totaling over 4 million pounds over three years, to meet the growing global demand. Their products, such as the 200 Oasis Thermal Top and 260 Tech Thermal Leggings, are praised for their comfort, breathability, and performance in both cold and hot weather conditions. With a brand awareness of 24% among outdoor fashion owners in the United States and a loyalty rate where 67% of owners are likely to purchase again, Icebreaker stands out for its quality and customer loyalty. The company's commitment to sustainability and ethics, including 100% mulesing-free contracts with growers, further enhances its reputation. For more information, visit their official website.

Under Armour

Under Armour is a leading brand in the thermal underwear market, known for its high-quality and innovative products that provide superior warmth and comfort. The global thermal underwear market, which includes brands like Under Armour, is expected to grow at a CAGR of 3.71% from 2023 to 2031, reaching a market size of USD 11,036.07 million by 2031. Under Armour's thermal wear is popular among both outdoor enthusiasts and everyday consumers, contributing to the market's significant growth driven by rising demand for comfortable and effective cold-weather apparel. The brand's products are designed to provide insulation and retain body heat, making them a favorite in regions with cold weather. With its strong market presence, Under Armour continues to be a key player in the thermal underwear sector. For more information on their offerings, visit their women's thermal underwear page.

Columbia

Columbia is a leading producer of thermal wear, renowned for its innovative and high-performing products. In 2023, the brand achieved sales of $2.95 billion, marking a 3% increase in constant currency compared to 2022. This growth was driven by a robust international market performance and the success of its Omni-Heat Infinity technology, celebrated for its lightweight performance and inclusion in several 'best of' lists. Despite a warm winter, Omni-Heat Infinity demonstrated strong growth, and the brand’s Arch Rock Double Wall Elite jacket received a 2024 travel award from Good Housekeeping magazine. Columbia's focus on innovation, performance, and style continues to attract consumers, especially younger demographics. The brand remains committed to enhancing its product assortments and in-store presentations to deliver the best brand experience.

Helly Hansen

Helly Hansen is a renowned brand in the snow apparel market, particularly celebrated for its high-quality thermal wear. The company introduced the revolutionary Lifa(r) base layers in 1970, which excel in moisture management and keep wearers warm and dry. Helly Hansen's products, such as the Odin collection, are designed with advanced materials to protect skiers in harsh weather conditions. The brand holds a significant presence in the market, with Europe dominating the snow apparel sector, where Helly Hansen is a key player, contributing to the region's 44.7% market share. Helly Hansen's commitment to innovation and sustainability has made it a favorite among winter sports enthusiasts.

L.L.Bean

L.L.Bean, a renowned brand in the thermal underwear market, is known for its high-quality and durable products, contributing significantly to the global thermal underwear market valued at USD 7,951.13 million in 2022, with a projected growth at a CAGR of 3.71% until 2031. The brand’s thermal wear, crafted from materials like cotton, polyester blends, and wool, is popular among outdoor enthusiasts and residents in cold climates. L.L.Bean's commitment to quality and customer satisfaction has solidified its position as a staple in the industry, particularly in North America, the largest market for thermal underwear. Their product offering includes various sets of tops and bottoms catering to men, women, and kids, reflecting their dedication to meet diverse consumer needs. For more information, visit their official website.

REI Co-op

REI Co-op is renowned for producing high-quality thermal wear, offering a range of base layers that cater to various needs. Their midweight base layers, made from 92% recycled polyester and 8% spandex, are bluesign approved, ensuring both performance and sustainability. The REI Co-op Midweight Base Layer Half-Zip Top for men is priced between $29.83 and $59.95, and the Midweight Base Layer Bottoms range from $37.93 to $54.95. These products are available in regular, big, and tall sizes, making them accessible to a wide range of users. REI Co-op's commitment to using recycled materials and adhering to strict environmental standards sets them apart as a leader in the outdoor apparel industry.

Terramar

Terramar is a renowned brand in the thermal wear market, known for its high-quality baselayers and thermals that offer optimal thermal regulation and comfort. Their Merino Pro series, enhanced with innovative knit construction and Climasense technology, ensures superior performance. The brand's Heritage Series is designed for a wide range of activities and temperatures, making it a staple for outdoor enthusiasts and everyday commuters. As part of a growing market, Terramar contributes to the global thermal underwear market, which is expected to reach USD 11,036.07 million by 2031, growing at a CAGR of 3.71% from 2022 to 2031. Terramar's products are highly regarded for their moisture management and thermal regulation, making them a top choice in the industry.