When it comes to leaders you have two choices: you can buy them or you can tie your own. If you’re going to tie your own you’ll want to get an instruction book that shows you how to do this. If you’re going to buy them you’ll want to look for a leader that is suitable to the area where you are going to be fishing. For example, if you’re going to fishing for bream (salt water fly fishing) you’ll want to use a light leader that weighs about 2lbs.