No rack required – securely straps canoe to car roof. 4 cut-out foam blocks are also compatible with most factory roof racks. Thick closed-cell foam is sturdy, but will compress before damaging vehicle. Adjustable size will fit most standard to large size canoes. Over-Hull webbing strap with cinch buckle. 2 V-style bow/stern straps. To securing S-Buckle ropes. All components store neatly in mesh carry bag.