A bag is disclosed for covering an endless track or chain of a tracked heavy equipment vehicle during transport. The bag includes an outer segment for covering an outer portion of the track extends laterally beyond side edges of the trailer flatbed. Forward and rearward lobes of the bag, respectively engage and cover forward and rearward ends of the track. An inner bag segment engages and covers the track between the side edges of the flatbed trailer supporting the tracked vehicle. A recess in an inside segment of the bag accommodates a track and allows the track to directly engage the supportive trailer. Tensioning straps and cords are used to further secure the bag to the track.