http://rubies.com/landingpage.cfm?ItemNumber=55026 for costume http://rubies.com/landingpage.cfm?ItemNumber=554 for trident Cut the crotch out, then it will be naughty and sorry no sandles
If you are really acting in a ninja-like manner for any period of time ... the crotch will rip out all by itself. Don't ask me how I know (white ninja) ...