[Fleece-Lined Comfort]: This mens thermal pants with high quality fleece lining inside provide comfortable warmth for all day wear, and make you enjoy your favorite winter activities. Stay warm and soft, let you say goodbye to cold feelings. [Available for Free Cutting Design]: The special sewing techniques are applied to prevent ripping or tearing, and the fabric cutting edge can be super soft without any loose thread. [Double Thickness Knee Fabrics]: The long johns for men has double thickness knee fabrics for extra cold protection, so it can warm up our knee joint, enhance knee proprioception and keep the whole body in a comfortable temperature to beat the cold weather, perfect for hiking, snowboarding, skiing, biking, hunting, camping, or doing any other outdoor sports. [4-Way Stretch & Ergonomic Convenience]: The mens thermal bottom adopts the latest 4-way stretch technology to make you enjoy a great freedom of movement in gym, office, home, etc. The tag-less design makes it second skin to fully fit and warm you. This thermal base layer features an ergonomic fly/pee hole adding more convenience in daily life. [Most Warm Gift for Him]: mens long underwear features excellent washing color fastness, so you don't need to worry about dying fade while washing. Please refer to the size chart to choose the size that suits you. Any suggestions are welcome, please contact us anytime. We’re ready to serve you with full satisfaction.