10 Best Mens Long Johns 2025 in the United States

The Amazon Essentials Thermal Long Johns set is a good option if you're looking for lightweight, slim-fitting thermal underwear to keep you warm without feeling bulky. Made from a cotton and polyester blend, the material is soft and breathable thanks to its waffle knit design, which helps with moisture control as you wear it throughout the day. The slim fit means the top and bottoms hug your body closely, which is great if you want to wear layers over them without extra bulk. The elastic waist and ribbed cuffs on the bottoms add comfort by keeping the leggings in place.

This set offers decent warmth and is comfortable for everyday use, though it might not be the best choice if you need heavy-duty insulation for extremely cold conditions. The cotton-poly blend is easy to care for but doesn’t have specialized odor resistance features, so it may require regular washing after active use. Durability is solid for the price, but since it’s designed as affordable thermal wear, it may show wear sooner than higher-end options.

These long johns perform well for casual cold-weather use and layering, especially if you want a snug fit and breathable fabric without spending too much.

The Fruit of the Loom Men's 3-Pack Recycled Waffle Thermal Underwear Bottom is crafted from a soft mini waffle fabric made of 52% cotton and 48% recycled polyester. This blend provides a comfortable feel and adequate warmth, suitable for cold to moderately cold conditions. The waffle texture aids insulation while allowing moisture to wick away, preventing clamminess during wear. Featuring a pull-on design, these long johns deliver a relaxed fit, making them easy to layer under pants without feeling tight or restrictive. The fabric is quick drying, enhancing comfort during activity or sweat.

The reinforced flat seam construction suggests durability and reduced skin irritation. Though there is no explicit mention of odor resistance beyond moisture-wicking, the recycled polyester component may help reduce smell build-up compared to cotton alone. The product is machine washable, offering simple maintenance. One limitation is that the insulation is best suited for cold but not extreme cold environments, which may make these less ideal for very harsh winter conditions. Additionally, the traditional pull-on fit may not provide the snug compression preferred by some for athletic use.

These long johns serve as a practical option for everyday wear in cooler weather, combining comfort, sufficient warmth, and durability with an eco-friendly fabric blend.

The TELALEO 2 Set Mens Thermal Underwear offers a warm and comfortable base layer, thanks to its fleece-lined fabric made of 85% polyester and 15% spandex. This blend keeps heat in well, making it suitable for cold winter weather. The material has a good four-way stretch, allowing for easy movement without feeling tight or restrictive. The snug fit helps prevent heat loss by keeping the garment close to your body.

Moisture-wicking properties effectively pull sweat away, helping you stay dry during physical activities or everyday use. The soft fleece lining, combined with flatlock seams, adds extra comfort and reduces skin irritation, which is great if you wear them for long periods. While the fabric dries quickly and is easy to care for with machine washing, it is recommended to avoid using a dryer to maintain the garment's integrity.

These long johns perform well as a versatile choice for outdoor sports like skiing or snowboarding, as well as for indoor lounging or sleepwear, especially in very cold conditions.