"For the record":.... a feature of "As it Happens"
Quoth the Jacks:
The basic performance of the quilts is established by the quilt dimension/design not by the insulation material. We provide a 15-22% overstuff factor in all our quilts. This over stuff compensates for deviations from certified standards and it provides for field variations in humidity from laboratory rating and testing standards. It also reduces down shifting beyond normal expectations. For the record, JRB believes its 15-22% overstuffing provides for consistent field performance.
http://www.jacksrbetter.com/Rectangular%20Quilts.htm