Locally our stihl dealer and husky dealer both sell nice chaps for about 100. One thing to look for is whether or not they are washable. I know the stihl ones are washable.
You need to wash them occasionally because the fibers need to be able to tear out and clog the cutting attachment.
Also you can chose between apron and wrap chaps the wrap go around your calf and offer more protection but will restrict mobility some.
when you get chaps make sure that you wear them tight, specifically on your left leg. The left leg is the most likey to be injured by chainsaws. Wearing chaps loose will allow the saw to spin the chaps on your leg and still cut your leg.
there is also info on chaps in the safety section.
