A combustor panel (400; 500; 600; 700) for use in a gas turbine engine combustor section, the combustor panel comprising: a panel body having a first wall (404; 504; 604; 704) with a first sidewall (408; 508; 608; 708) and a second sidewall (414; 514; 614; 714) each extending from the first wall in the same direction at edges of the first wall; and a plurality of cavity walls arranged between the first sidewall (408; 508; 608; 708) and the second sidewall (414; 514; 614; 714) and extending from the panel in the direction of the first and second sidewalls, wherein a plurality of cooling cavities (416, 418; 516, 518; 616; 716) are defined by the cavity walls, the first wall (404; 504; 604; 704), and at least one of the first sidewall (408; 508; 608; 708) and the second sidewall (414; 514; 614; 714), wherein each cooling cavity (416, 418; 516, 518; 616; 716) extends from an inlet hole (420, 422; 520; 620; 720) to an outlet hole (406, 410; 506, 510; 606; 710), wherein the outlet hole is formed in the first wall (404; 504; 604; 704); characterized in that the plurality of cooling cavities (416, 418; 516, 518; 616; 716) comprise: at least one first cooling cavity (416, 516, 616, 716) having a respective first inlet hole (420, 520, 620, 720) and a respective first outlet hole such that a flow through the at least one first cooling cavity is in a direction from the second sidewall toward the first sidewall; at least one second cooling cavity (418, 518) having a respective second inlet hole and a respective second outlet hole such that a flow through the at least one second cooling cavity is in a direction from the first sidewall toward the second sidewall; and wherein the at least one first cooling cavity is adjacent the at least one second cooling cavity and fluidly separated therefrom by at least one cavity wall of the plurality of cavity walls. a panel body having a first wall (404; 504; 604; 704) with a first sidewall (408; 508; 608; 708) and a second sidewall (414; 514; 614; 714) each extending from the first wall in the same direction at edges of the first wall; and a plurality of cavity walls arranged between the first sidewall (408; 508; 608; 708) and the second sidewall (414; 514; 614; 714) and extending from the panel in the direction of the first and second sidewalls, wherein a plurality of cooling cavities (416, 418; 516, 518; 616; 716) are defined by the cavity walls, the first wall (404; 504; 604; 704), and at least one of the first sidewall (408; 508; 608; 708) and the second sidewall (414; 514; 614; 714), wherein each cooling cavity (416, 418; 516, 518; 616; 716) extends from an inlet hole (420, 422; 520; 620; 720) to an outlet hole (406, 410; 506, 510; 606; 710), wherein the outlet hole is formed in the first wall (404; 504; 604; 704); characterized in that the plurality of cooling cavities (416, 418; 516, 518; 616; 716) comprise: at least one first cooling cavity (416, 516, 616, 716) having a respective first inlet hole (420, 520, 620, 720) and a respective first outlet hole such that a flow through the at least one first cooling cavity is in a direction from the second sidewall toward the first sidewall; at least one second cooling cavity (418, 518) having a respective second inlet hole and a respective second outlet hole such that a flow through the at least one second cooling cavity is in a direction from the first sidewall toward the second sidewall; and wherein the at least one first cooling cavity is adjacent the at least one second cooling cavity and fluidly separated therefrom by at least one cavity wall of the plurality of cavity walls. at least one first cooling cavity (416, 516, 616, 716) having a respective first inlet hole (420, 520, 620, 720) and a respective first outlet hole such that a flow through the at least one first cooling cavity is in a direction from the second sidewall toward the first sidewall; at least one second cooling cavity (418, 518) having a respective second inlet hole and a respective second outlet hole such that a flow through the at least one second cooling cavity is in a direction from the first sidewall toward the second sidewall; and wherein the at least one first cooling cavity is adjacent the at least one second cooling cavity and fluidly separated therefrom by at least one cavity wall of the plurality of cavity walls.