Best thermal shirts

Known for its exceptional value, this base layer provides a blend of heat retention and moisture-wicking performance. It's lightweight, stretchy, and incredibly soft, making it a comfortable choice for daily wear or light activity.

Known for its exceptional value, this base layer provides a blend of heat retention and moisture-wicking performance. It's lightweight, stretchy, and incredibly soft, making it a comfortable choice for daily wear or light activity.

Designed specifically for women, this base layer combines the natural warmth and softness of merino wool with a stylish Nordic-inspired design. It offers excellent thermal regulation and a flattering, feminine fit.

A highly popular and affordable option, this waffle-knit thermal adapts to your body temperature for all-day comfort. It's a reliable and budget-friendly choice for everyday warmth and layering.

Duofold specializes in thermal wear, and this mid-weight option is designed for performance in cold weather. It often features a two-layer construction to trap air for insulation while wicking moisture away from the skin.

A top choice for athletes, this compression shirt features a dual-layer fabric with a warm, brushed interior and a fast-drying exterior. It keeps you warm without the weight and bulk of traditional thermals, making it perfect for training in the cold.

Orvis is known for high-quality outdoor and fly-fishing gear, and their Drirelease base layers are no exception. This shirt excels at wicking moisture and drying quickly, keeping you comfortable during active pursuits in variable temperatures.

A favorite among outdoor enthusiasts, this base layer provides the perfect balance of weight, breathability, and wicking performance. Its smooth face fabric makes it easy to layer, and it's treated with HeiQ Pure odor control.

Icebreaker is a pioneer in merino wool apparel, and this base layer is a testament to their quality. It's incredibly soft, breathable, and effective at regulating body temperature in both cold and cool conditions.

A premium option for serious adventurers, the Rho LT provides thermal comfort with excellent moisture management properties. Its Torrent fleece fabric is soft and stretchy, allowing for maximum freedom of movement.

Offering great value and performance, this shirt from REI's own brand is designed to keep you warm and dry during outdoor pursuits. Its fabric wicks moisture effectively and has a soft, comfortable feel against the skin.

This shirt features Columbia's Omni-Heat thermal-reflective technology, which uses small silver dots to reflect and retain body heat. It provides significant warmth while maintaining a high level of breathability.

Built for durability and hard work, this heavyweight thermal from Carhartt is designed to withstand tough conditions. It combines excellent warmth with FastDry technology to wick away sweat, keeping you comfortable on the job.

Duofold specializes in thermal wear, and this mid-weight option is designed for performance in cold weather. It often features a two-layer construction to trap air for insulation while wicking moisture away from the skin.

Made from 100% merino wool, this shirt offers superior warmth and breathability for a wide range of activities. It's known for its comfortable, slightly looser fit, making it a great option for those who prefer less compression.

This base layer is a top choice due to its 100% Merino wool construction, which is exceptionally soft, warm, and naturally odor-resistant. The quarter-zip design allows for easy temperature regulation, making it versatile for various cold-weather activities.

This lightweight merino wool base layer from L.L.Bean is perfect for year-round activities, providing warmth without overheating. It's naturally moisture-wicking and odor-resistant, making it a versatile and reliable choice.

This base layer from Land's End is designed to provide warmth without adding bulk, making it perfect for layering under everyday clothes. The fabric is soft and stretchy, offering a comfortable fit that moves with you.

Praised for its smart design and high-performance capabilities, this thermal underwear provides excellent heat retention and moisture-wicking properties. Its fleece-lined interior and snug fit ensure maximum comfort and warmth without feeling bulky.

Uniqlo's HEATTECH fabric is renowned for its innovative heat-retaining fibers that generate warmth from body moisture. The Ultra Warm version offers superior insulation, making it ideal for extremely cold conditions while remaining lightweight.