The dermal treatment is like a permanent body armor grafted right under the dermis. It acts as a subdermal armor plating, absorbing damage before it can harm the body. For mobility reasons it cannot completely cover a person, and it's most commonly only done on the thorax to protect vital organs.
The subdermal composite thermoplane armor offers the following protections:
4 Slash
3 Pierce
2 Blunt
2 Shock