From the back cover:
The Martial Arts Companion gives you all you need to add true depth to martial arts in your game. Whether you run historical, fantasy, or even modern day campaigns, the rules in this product will assist you in giving martial artists the strengths (and weaknesses) they deserve.
This product features...
New and redesigned martial arts skills for the Rolemaster Standard System.
Examples of historical martial arts styles (as well as rules on using martial arts in the modern day).
Guidelines on how to make the concept of martial arts fit into your campaign (including notes on the cultures from which most martial arts are derived).
Rules for customizing martial arts styles.
Two new variants of the Monk profession with new and revised spell lists for each.
New and revised training packages that allow specialization for your martial artist.
New Chi powers and abilities that allow characters to transcend normal limits of physical reality.