Fabric

A fabric for use in a wearable article, the fabric having a first side directed to an inner side of the article as worn and a second side directed to an outer side of the article as worn, the fabric comprising a sheet formed of a substantially impermeable elastomeric material having perforations provided therethrough, the first and second sides being in air flow communication with each other through said perforations, each of said perforations defining two distinct regions, each perforation having at least one relatively wide region along its length and at least one relatively narrow region along its length whereby said perforation defines an internal chamber at said relatively wide region, said internal chamber open to the first side of the fabric, said internal chamber being a depression formed in the first side of the fabric which in use partially encloses a volume of air directly above the skin of the wearer, said relatively narrow region of said perforation having a width less than 35% of a width of said relatively wide region when in a resting condition of the sheet so as to permit air passing from the first side to another side of the sheet to accumulate in the chamber under increased pressure prior to passing out to the other side of the sheet when the increased pressure causes said relatively narrow region of said perforation to open against a restoring force provided by the elastomeric material.