Originally Posted by nativetexan
my thread kept shredding and i ck'd. it was poly on poly. Coats and clark. thought it was cotton. used to always be. sigh. anyway it works fine in bobbin. so cotton on top always.
Coats & Clark has many threads available.
The "old" Dual Duty was cotton covered polyester.
The 'new" Dual Duty thread is polyester covered polyester.