Chip bonnet

a bonnet or a hat made of Chip. See Chip, n., 3.

See also: Chip

References in classic literature ?
when I DID find the house, and DID dismount at the garden-gate, and drag those stony-hearted boots across the lawn to Dora sitting on a garden-seat under a lilac tree, what a spectacle she was, upon that beautiful morning, among the butterflies, in a white chip bonnet and a dress of celestial blue