A quilt is a usually multilayered textile, made to warm the body. Air is trapped between the layers of the fabric of the quilt. This is the reason it is a better insulator compared to a woolen blanket of the same thickness.
As air is the poor conductor of heat, therefore, body heat is trapped inside the quilt and thus it more effective for maintaining the body heat
When the amount of gas in a container is increased, the volume increases. Lussac's law states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature.
