In winter, actually all parts of the body need to be heated especially if you want to leave the house. Maybe we are used to seeing people wearing scarf to warm the neck. Wear gloves to warm hands. Wear shoes to warm the legs. But it looks like we still rarely see people warm up legs.
Well to warm the leg, you need to wear Leg Warmer. If you have trouble finding Leg Warmer in stores, then you can make it yourself. Follow the steps on this Cute Free Crochet Leg Warmer Beginner-Friendly review.