The brim of a hat flops.

Why, Warwick, canst thou speak against thy liege, Whom thou obeyed’st thirty and six years, And not bewray thy treason with a blush?

[…] he had not risked taking a stick with him; and hat and stick were his proppage and balance-wheel, in short, his bowing-gear, […]

Income from audio books helps not inconsiderably to keep authors, and publishers, afloat.