AirFit P30i Pillows Cushion Cushion Size:Medium 63862 the hose connection location is

the hose connection location is the most likely cause

Over that silicone

the DreamWear Nasal mask will provide a less intrusive seal with a smaller cushion footprint

Because the UltraSoft foam seal does not depend on headgear tension for contact force — the foam fills the space rather than being pressed into it — overtightening works against the mask's design by compressing the foam before it has adapted and by creating pressure marks the mask is specifically built to avoid

Unmatched Stability: The ErgoForm headgear features both stretch and non-stretch panels to keep the mask secure without over-tightening

AirFit P30i Pillows Cushion Cushion Size:Medium 63862 the hose connection location isAirFit P30i Nasal Pillows from ResMed are designed for use with P30i Nasal Pillow CPAP & BiPAP Masks. They can also be used as an alternate cushion for AirFit N30i Masks. P30i Pillows are available in three sizes : Small, Medium, and Large to fit a wide range of faces. ResMed's AirFit P30i Nasal Pillows include a soft outer wall for comfort and a secure inner wall for support, making it easy to sleep on your side or stomach while maintaining a secure