airy

open to or abounding in fresh air; "airy rooms"

not practical or realizable; speculative; "airy theories about socioeconomic improvement"; "visionary schemes for getting rich"

having little or no perceptible weight; so light as to resemble air; "airy gauze curtains"

characterized by lightness and insubstantiality; as impalpable or intangible as air; "figures light and aeriform come unlooked for and melt away"- Thomas Carlyle; "aerial fancies"; "an airy apparition"; "physical rather than ethereal forms"