While exploring the outdoors, base layer bottoms help regulate your body temperature and wick away moisture. They are also comfortable at home, where the soft material against your skin suits relaxing just as well. Optimised for fit and functionality, Fjällräven favourites like the <a href="https://www.fjallraven.com/uk/en-gb/men/trousers/base-layer-bottoms/bergtagen-merino-190-lj-m/">Bergtagen Merino 190 LJ M</a> thermals, <a href="https://www.fjallraven.com/uk/en-gb/men/trousers/base-layer-bottoms/keb-fleece-trousers-m/">Keb Fleece Trousers M</a>, and <a href="https://www.fjallraven.com/uk/en-gb/men/trousers/trekking-tights/abisko-trekking-tights-pro-m/">Abisko Trekking Tights Pro M</a> make it easy to find the right pair of men’s base layer bottoms for any activity and weather conditions.