Due to how these were designed, as there is the opening (slit) where the headband passes through, it does not retain the alignment of holes that well. I used Razer Mamba, DeathAdder, Corsair Harpoon and FPS, Logitech. Theyre the total package. Isolation wise they are not the best. Zum Problem: Wenn ich die Lautstärke am Kabel regeln möchte, ist der Pegel auf beiden Kanälen unterschiedlich. It is also big enough to put in running shoes. The band that goes over the top of the head is actually stretchy! They fit perfectly. 5 and was afraid the 7 would be too small so I went up to an 8. Battery Life is great (8 Hours)6.