I have a number of Oster blades. My Goldendoodle tends to get very matted at the end of winter. These blades have done the best job so far. I have the exact same blade size 7 but not in Cryogen X material and so far it looks like indeed the Cryogen X makes a difference, indeed. Only time will tell, of course, but so far I am very happy with these blades. I am not giving 5 starts since I can't predict how they will perform over time, but definitely good blades.