Conversation so far:
what was the band Slipknot's image?
Slipknot is known for its attention-grabbing image; the members perform wearing unique, individual face masks.
what other things played a part in Slipknot's image besides wearing unique individual face masks?
Slipknot members also perform wearing matching uniforms—typically jumpsuits.

Question: What else were they known for?
Self-contained rewrite: What else was Slipknot known for besides unique face masks and matching uniforms?