Mackie Rolling Speaker Bag for Thump15A & Thump15BSTFEATURES The Mackie Thump 15A 15BST Rolling Speaker Bag is designed to preserve and protect your loudspeaker from the rigors of on the road wear and tear, while offering ease in transport with its integrated wheels and telescopic handle. The outer material is made from 600D polyester fabric with a water resistant polyurethane coating. Internally, the case uses polyethylene boards on the bottom and sides to provide a stiff, protective structure. A