Bonta gives us a single moment: a woman steps into the street wearing a new hat, and the speaker watches her go. The whole poem is built from two comparisons. First the hat is "like a sail," which suggests something light and bright that catches the air and carries her forward. Then it becomes a wilderness, something wilder and bigger than any ordinary accessory.
The speaker seems delighted and a little awed. A hat is a small, everyday thing, yet here it turns the plain street into open water or untamed country, and she becomes a kind of voyager. The word "travels" sits alone on its own line, so the movement feels almost like a pause before the journey begins.
The mood is playful, fresh and quietly admiring. Judging by the imagery, the hat gives her a confident, adventurous presence, and the speaker's eye turns a routine walk into something expansive and a bit magical.