These are perfect pajama pants. But you can also wear these as athletic wear.

This pants is made of 40% polyester. Unlike the polyester of yester-years, the contemporary polyesters are much more softer and comfortable.

The polyester adds strength, breathability, and moisture-wicking capabilities all in a light package.

The result is a very good athletic pants.

These aren't thick and probably not great for harsh winters.

Pros
1)Light, breathable, and comfortable.
2)Inexpensive

Cons
1)Doesn't block wind very well and not for the harshly cold weather.