WTF is wrong with ResMed that thinks it is a good idea to blow the air on the mask wearer???

I found I still had one stashed new PR Dreamwear (no headgear, so I ordered the new style with arms and I'm using my old, stretched out headgear in the meantime). That mask directs the vented air up and away from the wearer, and only leaks if it slips off the back of my head--looking forward to the "arms" to stop the slippage.