Sackcloths are rough, coarse cloth made from hemp or jute, often used for making sacks or bags.
Sackcloths are not very soft or comfortable, and they are usually used for practical, not fancy, things.
Examples:
The farmer made a sack from sackcloths to carry the potatoes.
She used sackcloths to make a scarecrow for the field.
The old man wore sackcloths as he worked in the garden.
The cat thinks sackcloths are a good place to scratch.
The princess didn't like the sackcloths dress because it was not soft.
The sackcloths rope was very strong and didn't break.