All Fisher & Paykel masks come fully assembled and ready to wear so there is no fumbling or confusion. The FlexiFit Cushion comes with a unique inner foam cushion provides a secure seal. Two sizes are included now instead of just one, to mold to a variety of nose and bridge shapes. Glider Strap Anti-Leak System.
This strap is used to connect the headgear to the mask frame for stability, but it slides across the frame when the head is turned so that the pressure of the seal stays uniform regardless of sleep position. Front Swivel Hose Connection. The HC405 has a swivel hose connection instead of the fixed one of the Aclaim 2 so that the hose may be positioned in any direction for ease of movement during sleep.