Please describe the new feature or change.
A sleeping bag option that is crafted out of leather, rather than wool.

Please describe why you want this feature.
I think that a sleeping bag made out of leather would be both realistic based on history and really helpful to players who spawn in biomes with next to no sheep and struggle to find enough spiders to craft wool from string. Perhaps it could be toggleable on/off for people who really want to just stick to the wool is required for sleep mantra that Mojang has stuck to.