Wearable artificial gill

An artificial gill garment for providing oxygen to a wearer in an underwater environment, the artificial gill garment comprising:

• a flexible, gas permeable membrane configured to allow permeation of air through the membrane and prevent permeation of water through the membrane;
• wherein the membrane is configured to allow unconstrained natural movement of the wearer;
• wherein the membrane is configured to provide an air reservoir between a plurality of surfaces of the membrane and is configured to fit over a part or whole of a torso of the wearer;
• wherein the membrane comprises a mask portion in fluid communication with the air reservoir, and configured to fit over at least facial respiratory features of the wearer;
• wherein the membrane or an outer surface of the membrane comprises a surface pattern and/or surface configuration to increase a surface area of the outer surface;
• and
• wherein the membrane is or comprises a porous hydrophobic material, wherein the porous hydrophobic material comprises polypropylene.