Ragdoll system meant to work with layered clothing, and includes some performance options.
See the Dev Forum thread for instructions and tips.
Consider supporting my work by buying my UGC:
https://www.roblox.com/catalog/?Category=0&Subcategory=0&CreatorName=Rookstun&SortType=3
[v1.1.2] Updated leftover code + Changed Collision Groups to its newer naming system.