Velcro sweat bands?
Comments
Headstock ones - They are slid onto the neck to stop open strings sounding when tapping
Bridge ones, to dull the attack of the note like putting foam under the strings at the bridge. Gives the attack more of a double bass sound.
Bridge ones, to dull the attack of the note like putting foam under the strings at the bridge. Gives the attack more of a double bass sound.

I feel like I should have some too but would like to be able to explain why if asked.