A saddlecloth is a piece of cloth that goes under a saddle to make it more comfortable for the animal.
Saddlecloths are often colorful and can be a way to show off.
Examples:
The horse wears a saddlecloth under the saddle.
I like the red saddlecloth on the horse.
The saddlecloth is soft and nice.
The saddlecloth is like a bed for the horse.
The queen's horse has a golden saddlecloth.
The saddlecloth is as big as a blanket.