A sensory details is use by the writer to connects the reader's five senses (sight, sound, smell, taste and touch) to an image or a description. The writer gives an image of ears with gray hair. From that image, the writer show us an estimated age of the character he's referring.
As a result, it has characteristics of both genres. Prose poetry is written like prose, in paragraphs rather than verse, but contains the characteristics of poetry, such as poetic meter, language play, and a focus on images rather than narrative, plot, and character.