Contrary to Raenryong's post, Royal Knight's Breeches are not superior to these for SAM, these have more STR for those 75% mod WS's, more HP, and Parrying skill +5 for when you pull hate, and as a SAM you are going to pull hate. These are pretty much the best pants SAM can have until 72+ when Shura Haidate, Byakko's Haidate, and AF+1 come into the picture.
Why do so many Samurai insist on using this ;o please refer to Royal Knight's Breeches for a superior option... at the very least for TP gain. Dusk Trousers are good too at higher levels!