gotta agree with Black Frog

flex fletch are the best. they are as tough as can be.
in two years of using them ive only had to refletch one arrow cause of a hole in the vane. That was because i was shooting broadheads.

like everyone else said though, they are kinda spendy, and you really have to prep the shafts before putting them on.

use flex bond glue and they won' t come off