I love how these blades shave and the smoothness and closeness of them, but I started to notice that around 1 to 2 hours after the shave my chin and face really started to itch - all with different aftershave and shaving creme, etc. Other blades that have coating do not make me do this..... but Shark. Love the blade but will continue to monitor so I can no longer give them a 5 out of 5 rating - now a 4.0 to 4.5.