Need to get some breatheable sarking felt for a small roof extension. Apparently need this as the tiles i'm using aren't entirely suitable to the pitch we need which is around 22-25 degs.

Is there any one brand that's the best? Seen some Kingspan Nilvent stuff, also Tyvek keeps popping up. I'm assuming its all the same thick waterproof stuff?

Would a wickes/screwfix own brand jobby be any good?