Tanning Rack
Tanning Racks are utility blocks used to transform rotten flesh into leather.
Tanning Racks can be obtained by trading 2 Rubies to the Vigilante for one. This trade does not require any bounty to be completed, so you can start getting Tanning Racks immediately when you have your first Rubies.
Rotten flesh can be hung on a Tanning Rack and will gradually turn into leather over the course of a few minutes. This process will only occur while the Tanning Rack is exposed to sunlight, so it will not work at night. It will also be slightly faster in arid biomes, such as deserts and badlands.