09/02/2026
Good data is only as good as the methodology behind it. Mary Thorpe, ISPA's Director of Industry Research and Analytics, walks through how ISPA tracks the full picture of U.S. mattress manufacturers, even those that do not participate in the survey.
Catch up on the series first: https://www.youtube.com/playlist?list=PLEmClxZftGrU
More on the MITR: https://sleepproducts.org/statistics/industry-sales-data/