This kit contains both the foam cushion insert and silicone cushion seal for the Zest Nasal CPAP Mask and the and the Zest Q Nasal CPAP Mask with Headgear.As of January 2010, Fisher and Paykel has improved the FlexiFoam Cushion Insert. The inner foam cushion helps contour the mask and promotes optimal frame alignment. The new design includes a series of ridges on the foam insert. The FlexiFoam cushion uses these cut-outs to help fold over facial features for additional comfort and improves overall seal performance.