YLI Wonder Invisible Thread

Invisible thread is used on the top (through the needle) normally with a thread such as a 50 weight or 60 weight cotton thread in the bobbin. We do not recommend using invisible thread in the bobbin.

To keep the spool tidy we recomment thread nets or cotton bandaging. Cone/spool fits all machines (0.004). 1500 yds per spool (1371m)