The current fashionable headwear is a knit hat resembling a baby bonnet

An undated handout photo shows a bonnet by Pien Studios, which the brand calls a balaclava. The hat is available in pink, as well as in red, white, black and gray. Photo: The New York Times

For anyone living in cooler climates, it’s often the case that a specific cold-weather accessory – a rainbow-check scarf, for example – comes to define the winter season. This year, that item appears to be a knit hat that could be described as a baby bonnet for adults.

It also evokes a balaclava, leading some sellers to christen it the “balabonnet”.