Assassin’s Creed: Syndicate - Patch 1.31 Changelog:

Added DLC Jack The Ripper support
Added additional parameter to AC.ini for disabling cloth motion 30FPS limits
Fixed crash in multi-monitor mode in London
Fixed FXAA with enabled MSAA
Fixed changing of display in fullscreen mode issues
Fixed flickering panel in World Map
Fixed various render issues
Fixed several online issues
Minor UI improvements


And here is how you can disable the game's 30fps cloth physics cap:

In the AC.ini file located in "MyDocuments//Assassins Creed Syndicate", modify the FlexibleMotionSimulationFPS parameter found in the "[OPTIONS]" section as follows:

- To enable the cloth setting: FlexibleMotionSimulationFPS=1
- To disable the cloth setting: FlexibleMotionSimulationFPS=0

By default this functionality is disabled. You may need to add the parameter manually.