An artificial gill garment 100 is provided for providing oxygen to a wearer in an underwater environment. The artificial gill garment comprises a membrane 110 configured to allow permeation of air through the membrane and prevent permeation of water through the membrane. The membrane is configured to provide an air reservoir. A method of manufacturing the artificial gill garment using three-dimensional printing or casting is also provided. The gas permeable waterproof membrane may be manufactured from a mixture of a hydrophobic material and a hydrophilic material where a membrane is formed and then washed in water to remove the hydrophilic material and create pores in the membrane.
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