I wouldn't bother the have a fault which makes them tear across the bridge of the nose. I have bought 2 of them and the same thing happened both times.

Hi There,
I had the same problem, the first time (it lasted 4 weeks) I thought it was me due to being a restless sleeper. so I bought a replacement cushion but 4 weeks later it did exactly the same thing.
at the price they are selling it they should get it replaced for free.