I've had the opportunity to try several blades now, and with a lot of them I can get 7 shaves (3 passes average). I could probably go longer, but it's not worth trying, and it's a lot easier to remember to change the blade out on the same day of the week. I can understand that some guys have a denser, harder beard, but it looks to me that near everyone gets only 3 shaves or so out of even the best blades.
Astra, Shark, Feather, Iridium...one week, no problem. It's only the likes of Derby, Dorco, Treet, 7 o'clock green that I can only get a few good shaves (or less than one in the case of Dorco).
Astra, Shark, Feather, Iridium...one week, no problem. It's only the likes of Derby, Dorco, Treet, 7 o'clock green that I can only get a few good shaves (or less than one in the case of Dorco).