Best Long Johns Thermal Bottoms for Men of 2025

The Heatwave Thermal Trousers are an essential addition to your winter wardrobe. This pack of two offers a 0.45 TOG rating, ensuring you stay warm by trapping more air close to your skin. The comfort fit, with its ribbed construction, shapes perfectly to your body contours, providing both warmth and comfort. Available in multiple colours, these thermal trousers are ideal as a baselayer, making them versatile for various outdoor activities or lounging at home.

The DOLCE ENVY Thermal Trousers are designed to keep you warm and comfortable during winter. Made from a blend of 50% cotton and 50% polyester, these trousers feature heat preservation technology that helps reduce heat loss while remaining lightweight. The breathable materials ensure optimal temperature regulation, making them perfect for various activities. Additionally, the fabric absorbs sweat quickly, keeping you dry and free from unpleasant odours, which is especially beneficial during exercise.

The SIMIYA Thermal Long Johns offer exceptional fleece-lined comfort, ensuring you stay warm and cosy throughout the day. The unique free cutting design allows you to customise the leg length to your preference, providing a perfect fit. With double thickness knee fabrics, you can enjoy extra protection against the cold, making them ideal for outdoor activities like hiking and skiing. The 4-way stretch technology ensures you have complete freedom of movement, whether at the gym or relaxing at home.

The HEAT HOLDERS Thermal Bottoms are designed for ultimate comfort and warmth. The ribbed construction provides a snug fit that contours to your body, ensuring you stay comfortable all day. The soft brushed inner maximises warmth by trapping air, keeping you cosy in cold weather. With an elasticated waist, these bottoms adjust to your body shape, offering a secure fit without feeling restrictive. Made from a cotton-rich blend, they provide natural softness, making them perfect for all-day wear.

The Fruit of the Loom Long Johns are designed for comfort and warmth. Made from U.S. sourced cotton and recycled polyester, they offer a soft feel against your skin. The mini waffle fabric provides excellent insulation, keeping you warm in cold to moderately cold conditions. Additionally, the moisture-wicking and quick-drying properties ensure you stay dry, making these long johns perfect for active days. With reinforced flat seam construction, they enhance durability and comfort, allowing for a snug fit without irritation.

The INNERSY Thermal Long Johns are designed to keep you warm and comfortable during winter activities. With a lightweight fabric that offers a snug fit, you can wear them all day without feeling bulky. The practical open fly makes these thermal leggings easy to use while providing warmth in chilly conditions. They are perfect for both outdoor adventures like skiing and cycling, as well as indoor lounging or work. Enjoy the high elasticity that ensures freedom of movement, keeping you flexible and cosy throughout the winter.

The orbiz Thermal Trousers are designed for ultimate comfort and warmth. Made from a blend of cotton and polyester, these trousers are incredibly soft against your skin while allowing breathability to keep you fresh. The heat retention feature ensures you stay warm even in the coldest conditions, while the moisture-wicking properties help maintain a comfortable temperature. With their 4-way stretchy fabric, you'll enjoy flexibility that allows you to move freely without feeling restricted, making them perfect for outdoor activities.

The HIPOWER Thermal Long Johns are designed to keep you warm during the chilly winter months. Made from ultra-soft micro-fleece fabric, they fit snugly to minimise heat loss while remaining lightweight. The advanced 4-way stretch allows for excellent comfort and movement, making them perfect for activities like running or yoga. Additionally, their moisture-wicking properties ensure you stay dry by quickly drawing sweat away from your skin, providing you with a sense of security in cold weather.

The Heat Stoke Thermal Long Johns are designed to keep you warm during the chilly winter months. With a TOG rating of 0.45, these long johns effectively trap body heat, ensuring you stay comfortable. The brushed inside technology significantly enhances cold resistance, making them perfect for outdoor activities. Additionally, their ribbed construction fits snugly to your body, providing both warmth and style. Ideal for layering, these long johns feature an open fly design for added convenience, making them a practical choice for your winter wardrobe.

The Gaffer Thermal Long Johns are designed to keep you warm during chilly winter days. With a TOG rating that helps retain heat close to your skin, you can enjoy outdoor activities without feeling the cold. The comfort fit and ribbed construction ensure that these thermals shape to your body, providing maximum comfort. Additionally, the soft brushed inner made from advanced insulating yarn offers high-performance insulation, perfect for winter sports or simply staying cosy at home.