For sleeping in, walking around the neighborhood, watching TV, long layovers, and all those other times when jeans just won't cut it. They've got an elastic waist, cuffed ankles, and sit right at the hip. (Plus a matching sweatshirt!)
This fabric gets its soft superpowers from the fact that it's fleeced on the inside and then peached on both sides. Which basically means this is as soft as it gets.