The Convertable Series is a new ResMed concept that allows cushions to interchange with other masks. The SoftGel frame and Activa LT frame are identical. The ActivaCell or DoubleGel cushion will work with either mask. This provides users with a choice of technologies at the cost of a new cushion instead of a complete mask.

DoubleGel technology automatically seals around the user's face and offers a personalized fit. The two layers of gel provide comfort and stability while maintaining a solid seal. The clear gel layer sits against the cheeks and provides a soft, gentle feel while conforming to any unique facial features. The blue gel layer is more dense; therefore, providing additional support and stability once the mask is fitted.

The MicroFit Dial allows CPAP users to find the right fit using 24 small incremental adjustments. The dual-wall cushion and forehead move in tandem as the dial is turned. This design is intended to address difficultly with "first time" fittings and also helps prevent the need to over-tighten headgear.