I bought the velcro attached strap from the Dreamwear. I used to use a Dreamwear for quite a long while. I finally swithched because I used to wake up to see if the Dreamwear was leaking.
So my P10 has two straps on--the ResMed one, and the Respironics Dreamwear one that drops down so it's lower on the back of my head.
Does it work? On good nights. On bad nights it's terrible.
I have a cut on the top of my nose from the N20 elbow attachment. I wanted to wear the P10 to let my nose heal. Well it hasn't yet. I have also tried a LARGE insert in the N20. I had to buy a LARGE N20 to get the insert. Bah. Humbug....
That was expensive.
Now a more expensive trial. I'm thinking of buying a F&P Evora Full I think it costs $90 Canadian here....I need a prescription to get one. So two providers are selling to me. My DME supplier I buy masks and my S10 for her from, and this other firm that has sold me so many things they think I have an active prescription.
I'm reluctant to buy anything else from Respironics....think foam gate....
I hope this helps...the big A store sells the parts for the Dreamwear. And this was reviewed in the Mask Review here.
My story isn't important. However, I hope that my experience will help you solve your issues (The P10 came. I was so happy. Late at night I woke up....decided to try it. I put it on but I was very sleepy and U didn't adjust the ResMed strap on the back of my head.....next morning my S10 reported my AHI was 43. 43!!!! Heck it was a cheap sleep study!
edit 2: "Dreamwear....Headgear with Arms" at A...... will lead you to the strap that fits lower on the back of your head. It fits easily on the P10.... I like it better than the Resmed strap on the P10