A support and drainage material comprising a foldable element comprising: at least one first section having a first end and a second end, a first side and a second side, a first major surface and a second major surface, and a plurality of parallel flow channels extending from the first end to the second end, the flow channels comprising side walls arranged in parallel and projecting upwardly from, and perpendicular to, the first major surface, the side walls having top walls; and, at least one second section having a first end and a second end, a first side and a second side, a first major surface and a second major surface, and a plurality of parallel flow channels extending from the first end to the second end, the flow channels comprising side walls arranged in parallel and projecting upwardly from, and perpendicular to, the first major surface, the side walls having top walls; wherein the first section is connected to the second section by a flexible hinge; wherein, the at least one first section further comprises at least one first section aperture extending a length of at least about 75% a distance between the first end of the first section and the second end of the first section, and extending a length of about 2% to about 100% a distance between the first side of the first section and the second side of the first section, and/or the at least one second section further comprises at least one second section aperture extending a length of at least about 75% a distance between the first end 221) of the second section and the second end of the second section, and extending a length of about 2% to about 100% a distance between the first side of the second section and the second side of the second section; wherein, when the foldable element is folded, a portion of the first section fits in the at least one aperture of the at least one second section, and/or a portion of the second section fits in the at least one aperture of the at least one first section, providing parallel flow channels. at least one first section having a first end and a second end, a first side and a second side, a first major surface and a second major surface, and a plurality of parallel flow channels extending from the first end to the second end, the flow channels comprising side walls arranged in parallel and projecting upwardly from, and perpendicular to, the first major surface, the side walls having top walls; and, at least one second section having a first end and a second end, a first side and a second side, a first major surface and a second major surface, and a plurality of parallel flow channels extending from the first end to the second end, the flow channels comprising side walls arranged in parallel and projecting upwardly from, and perpendicular to, the first major surface, the side walls having top walls; wherein the first section is connected to the second section by a flexible hinge; wherein, the at least one first section further comprises at least one first section aperture extending a length of at least about 75% a distance between the first end of the first section and the second end of the first section, and extending a length of about 2% to about 100% a distance between the first side of the first section and the second side of the first section, and/or the at least one second section further comprises at least one second section aperture extending a length of at least about 75% a distance between the first end 221) of the second section and the second end of the second section, and extending a length of about 2% to about 100% a distance between the first side of the second section and the second side of the second section; wherein, when the foldable element is folded, a portion of the first section fits in the at least one aperture of the at least one second section, and/or a portion of the second section fits in the at least one aperture of the at least one first section, providing parallel flow channels.