Compatible identical to

AirTouch F20 Large Replacement Cushion, 63028 Full Face.

I COMBINE SHIPPING PUT IN CART CHECKOUT CONFIRM ORDER BUT DONT PAY THEN REQUEST an invoice

I bought a few of these from (China) and tested on my own airsense 11

Works perfectly the same as the one from resmed for $30 more...

I suspect they're the same exact thing just not "Branded" resmep