Hoods are made of leather, either calf skin or more preferably kangaroo hide. Thinner and more stiff (for certain styles) is preferred. Stitching should be done with waxed thread to ensure strength and longevity. Hoods should always be stored open, not closed.
Leather hoods made with the smooth side out around the face are lacquered for the longest life-span. This allows the smooth leather to be cleaned well if the bird eats in the hood. The rest of the hood around the back and over the eyes may be suede which won’t show as much wear if the bird scratches. For trapping hoods it doesn’t matter as they are intended for short term usage. Braces should be stiff so that they do not touch any of her feathers and short enough that the bird cannot bite them. The base of the beak opening must be wide enough to allow for the bird’s beak to open. If this opening is not large enough, the hood will not fit properly and the bird will resent it.