Best 3D Thermal Bottoms for Men of 2026

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 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 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.