The phrase "black bonnet" refers to a head covering, usually black in color, that is worn on the head.
Sentences with «black bonnet»
No fewer than 5 alloy wheel choices are available, as are 3 different colored roof and mirror caps and both white and black bonnet stripes. (jdpower.com)
Black bonnet vents and yellow / blue stripe make it easy to spot. (evo.co.uk)
Our test Cooper S was yellow with black bonnet stripes and a black cap, a paint scheme that garnered us many envious looks as we tooled around town. (cnet.com)