Equipped with dual-wall cushion in many sizes, surrounding by ActivaCell technology membrane alongside with MicroFit dial, <strong>Mirage Activa LT Nasal CPAP Mask by ResMed</strong> is promising excellent sealing even for the most active sleepers. Furthermore, Mirage Activa LT belongs to ResMeds’ ConvertAble Series Masks which means that its frame is also compatible with DoubleGel technology cushion from Mirage SoftGel Nasal CPAP Mask, and vice versa.