Exceptionally light, 4 letters
Far from claustrophobic, 4 letters
Free-flowing, in a way, 4 letters
Having good circulation, 4 letters
Having no perceptible weight, 4 letters
Light and thin, as material, 4 letters
Light in appearance, 4 letters
Lighthearted and gay, 4 letters
Like a screened porch, 4 letters
Like a stadium without a dome, 4 letters
Mount ___ (North Carolina birthplace of Andy Griffith), 4 letters
Cows on the open range?, 10 letters
Having just inhaled very deeply?, 11 letters
... scrambled to get flippant remarks from snobs at the polls?, 15 letters