My Filly showed first signs of dulling after 9 shaves without stropping. This proves nothing since I cannot say if this was the consequence of normal blunting effects of shaving. In fact it is fairly normal for this blade to get a touch up after 8-10 shaves. Since it's not my nature to give up so fast and for science sake I'll try the same with a different razor. This one is a C135 carbonsong near wedge TI, supposedly the hardest steel produced today. Now, if a blade should hold up it's this one.