Category
At level four, the skeleton of the subject has been completely replaced by polyceramic compounds. The bones are effectively unbreakable -- any force sufficient to break the bone would certainly kill the cyborg.
System
Provides a further +2 to soak (+5 total) and +1 die to brawl damage (+3 total), but the removal of much of the subject's bone marrow has side effects (-1 Stamina).
Prerequisites
Bone Lacing 3