Dan River was a brand name and they no longer are in business.. I cut many yards of their poplin back when I worked in the fabric department of a store. Kaufman makes a poly/cotton blend poplin
https://www.fabric.com/collection/ro...erfecto-poplin Denim also comes in different weights. This is a shirt weight denim, only 4 ounces
https://www.joann.com/sew-classic-bo.../11771649.html. It is much lighter than the 7-12 ounces bottomweights.