What do you mean when you say "almost 100% cotton"? Pellon's Legacy battings come in the following blends:
80/20 Blend (80% cotton, 20% wool)
Bamboo Blend (50% bamboo, 50% cotton)
Natural Cotton
Natural Cotton with scrim (this is the same as W&N)
Polyester
Soy Blend (50% soy, 50% cotton)
White Cotton
Wool
Warm & Natural isn't really a blend of cotton and poly, it's only the scrim that is poly, not the batting itself.