An airfoil (300; 400; 500; 600; 700; 800; 900; 1000; 1100) for a gas turbine engine, the airfoil comprising: a hybrid skin core cooling cavity (302, 304, 306; 414; 414a, 414b; 514a, 514b; 614a, 614b; 714a, 714b; 814a, 814b; 914a, 914b; 1014a, 1014b; 1114) defined by a cold wall (312; 420) and a hot wall (310; 418), wherein the hot wall is exposed to an exterior environment of the component; and a hybrid skin core cooling cavity resupply hole (426; 526; 626; 726; 826; 926; 1026; 1126) formed in the cold wall and fluidly connecting a cold core cavity (308; 416) and the hybrid skin core cooling cavity, wherein the hybrid skin core cooling cavity resupply hole extends between an inlet (428; 1128) on a side of the cold wall exposed to the cold core cavity and an outlet (430; 1130) on a side of the cold wall exposed to the hybrid skin core cooling cavity, and wherein the hybrid skin core cooling cavity resupply hole is angled at an injection angle (α) such that air passing through the hybrid skin core cooling cavity resupply hole is injected into the hybrid skin core cooling cavity at the injection angle and at least partially parallel to a direction of flow within the hybrid skin core cooling cavity, characterised in that the hybrid skin core cooling cavity resupply hole is angled relative to the cold wall at the injection angle (α), and in that the airfoil further comprises: a segmented rib within the hybrid skin core cooling cavity, wherein a gap is formed between segments of the segmented rib; wherein at least one of the inlet and the outlet are positioned within the gap between two segments of the segmented rib; wherein the segmented rib divides the hybrid skin core cooling cavity into a first subcavity and a second subcavity; and wherein the outlet of the hybrid skin core cooling cavity resupply hole is arranged to supply resupply air into both the first subcavity and the second subcavity. a hybrid skin core cooling cavity (302, 304, 306; 414; 414a, 414b; 514a, 514b; 614a, 614b; 714a, 714b; 814a, 814b; 914a, 914b; 1014a, 1014b; 1114) defined by a cold wall (312; 420) and a hot wall (310; 418), wherein the hot wall is exposed to an exterior environment of the component; and a hybrid skin core cooling cavity resupply hole (426; 526; 626; 726; 826; 926; 1026; 1126) formed in the cold wall and fluidly connecting a cold core cavity (308; 416) and the hybrid skin core cooling cavity, wherein the hybrid skin core cooling cavity resupply hole extends between an inlet (428; 1128) on a side of the cold wall exposed to the cold core cavity and an outlet (430; 1130) on a side of the cold wall exposed to the hybrid skin core cooling cavity, and wherein the hybrid skin core cooling cavity resupply hole is angled at an injection angle (α) such that air passing through the hybrid skin core cooling cavity resupply hole is injected into the hybrid skin core cooling cavity at the injection angle and at least partially parallel to a direction of flow within the hybrid skin core cooling cavity, characterised in that the hybrid skin core cooling cavity resupply hole is angled relative to the cold wall at the injection angle (α), and in that the airfoil further comprises: a segmented rib within the hybrid skin core cooling cavity, wherein a gap is formed between segments of the segmented rib; wherein at least one of the inlet and the outlet are positioned within the gap between two segments of the segmented rib; wherein the segmented rib divides the hybrid skin core cooling cavity into a first subcavity and a second subcavity; and wherein the outlet of the hybrid skin core cooling cavity resupply hole is arranged to supply resupply air into both the first subcavity and the second subcavity. a segmented rib within the hybrid skin core cooling cavity, wherein a gap is formed between segments of the segmented rib; wherein at least one of the inlet and the outlet are positioned within the gap between two segments of the segmented rib; wherein the segmented rib divides the hybrid skin core cooling cavity into a first subcavity and a second subcavity; and wherein the outlet of the hybrid skin core cooling cavity resupply hole is arranged to supply resupply air into both the first subcavity and the second subcavity.