To use this feature, ensure you have WorldGuard installed and have created the regions where you wish to allow or deny specific cosmetics.

In the config.yml file, locate the world-guard section and set enable to true. Restart your server to apply the changes.

There are currently two flags available:
cosmetics - a state flag (allow/deny) to control all cosmetics within a region.
blocked-cosmetic-categories - a set flag. By adding a specific category, it will deny the use of all cosmetics in that category within the region.

/rg flag my-calm-region cosmetics deny - This will deny ALL cosmetics in the my-calm-region.
/rg flag pvp-arena blocked-cosmetic-categories gadgets - This will deny all gadgets in the pvp-arena region.