The darts fly better than the blue (original) Darts. They are slightly thicker and heavier. The head is thick and therefore does not fit in all Nerf guns. Front glued on the head of the Velcro. The Velcro keeps not very long, because it is only glued on and if you want to remove a dart from the clothes, it may happen that the adhesive dissolves. But Do not worry! The darts can between, buzz or hum. Generally whistle :).
Very great product I can only recommend.