Fusion Urban Large Fuse-On Attachment Bag, Black (UA-03-BK) Fuse-On bags attach to the front of Fusion Urban Woodwind, Brass, and Guitar gig bags. Fits on the base area of the Urban Guitar bag and to the front of the Urban Brass/Woodwind bags 10mm high density foam padding for all round protection Rear compartment to store backpack straps when fused-on Removable padded 15" laptop sleeve