10 Best Men's Thermal Long Sleeve Shirts 2025 in the United States

The CarharttMen Loose Fit Heavyweight Long-Sleeve Logo Sleeve Graphic T-Shirt is made from 100% cotton, which makes it comfortable and durable. This shirt features a rib-knit crewneck and cuffs, providing a snug fit around the neck and wrists. The side-seamed construction helps minimize twisting, ensuring the shirt maintains its shape throughout the day.

Additionally, the shirt has a tagless neck label for added comfort and the Carhartt signature logo printed on the sleeve, giving it a stylish appearance. It's designed to be machine washable, making it easy to care for, and it uses a pull-on closure for convenience.

The Under Armour Men's ColdGear Armour Fitted Mock in Black/White is designed to keep you warm while offering good ventilation and a comfortable fit. It features dual-layer fabric with an ultra-warm brushed interior and a smooth, fast-drying exterior, which helps in regulating temperature efficiently. The stretch-mesh back and underarm panels add strategic ventilation without sacrificing warmth, making it an excellent choice for cold-weather activities.

Its 4-way stretch construction ensures that the shirt moves with you, enhancing comfort and flexibility. The material wicks sweat and dries quickly, which is a big plus if you tend to sweat during physical activities. The ergonomic design keeps seams away from high abrasion areas, reducing discomfort and skin irritation.

The mock neck provides added coverage and warmth around the neck, which is beneficial in colder environments. The dropped, shaped hem offers additional coverage without feeling restrictive. While the shirt is fitted, it is streamlined to ensure it's not too tight or too loose, which many might find very comfortable. However, some might find the fitted design less forgiving if they prefer a looser fit. Given its design and features, this thermal long sleeve shirt is ideal for active men who need reliable warmth and moisture management in cold weather.

The Fruit of the Loom Men's Recycled Waffle Thermal Crew Top offers a good blend of comfort and functionality for cold weather. Its fabric combines U.S.-sourced cotton with recycled polyester, creating a soft yet warm waffle-knit material that effectively traps body heat. The moisture-wicking technology is a strong point, helping to pull sweat away from the skin and keep you dry during active or prolonged wear.

The fit is snug but flexible, designed to layer well under outerwear without feeling bulky, which is ideal for staying warm without added weight. The shirt features flat seams and a tag-free neckline, minimizing irritation and making it comfortable for all-day use. Ribbed cuffs help lock in warmth and prevent sleeves from riding up, which adds to its protective qualities.

While the fabric blend balances warmth and breathability, those looking for ultra-lightweight or high-performance technical fabrics might find it less suited to intense outdoor activities. The neckline is a classic crew, which works well for layering but may not be preferred by those wanting a higher collar for extra neck warmth. This shirt serves as a solid choice for everyday cold-weather layering, especially for casual or workwear use where comfort and warmth are priorities without specialized features.