The XTD Smoked FUSION left panel features a unique two tone finish, with a frosted front section ideal for hiding cables and a gloss tinted window rear area to show off your graphics card.The frosted area of the panel appears mid tone matte grey and the gloss tinted section appears almost black but is transparent, this panel compliments a black or grey themed case well.This particular configuration is a slotted vent, providing a good combination of airflow & subtle aesthetics.