A common question is: What is the blanket warmth of this quilt?
It's a quaint expression used uniquely in the Australian bedding retail sector. The question is asking bedding manufacturers to provide an indication of a quilt's warmth by comparing their various quilts to the number of equivalent wool blankets needed to provide the same warmth.
problem with such a measure is that nobody knows what the average
warmth is of any blanket. The term is thought to originate from the
relative warmth of a World War II army blanket, however, no one then or now
knows what the actual warmth rating is.
In retail experience, the term has a scale from one-cool to four-very warm, but this is still a very subjective term without empirical evidence.
Despite the above, the term is still commonly used by both retailers and consumers in Australia even though it is meaningless. The above explanation is merely provided as information rather than proposing its continued use.