1.7.1 is a release file of the Minecraft mod Cotton Resources for Fabric, made for Minecraft 1.16.1, 1.16. It was published on June 30, 2020 and is 0.6 MB in size. For the full description, screenshots and every other version, visit the Cotton Resources mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.