noun
air-permeability; breathability
Technical term used in materials science, textiles, and packaging. Often contrasted with 通気性, which is more common in everyday contexts.
See also: 通気性
このフィルムは透気性が高いため、食品の鮮度を保つのに適している。
This film has high air-permeability, making it suitable for keeping food fresh.
透気性試験の結果、この素材は通気性に優れていることがわかった。
The air-permeability test showed that this material has excellent breathability.
Compound of 透 (penetrate, permeate) + 気 (air, gas) + 性 (property, -ness). The exact historical derivation is uncertain; it is a modern technical coinage.