1.0.5 is a release file of the Minecraft mod Cotton for Fabric, made for Minecraft 1.16-Snapshot, 1.16.1, 1.16. It was published on June 26, 2020 and is 0.3 MB in size. For the full description, screenshots and every other version, visit the Cotton mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.