With only four parts, ResMed’s Mirage FX nasal CPAP mask is light weight, compact, and easy to clean and easy to use. The “butterfly wing” forehead support is designed to allow only the headgear and no plastic to come in contact with the skin. The easy squeeze-tab elbow allows you to easily connect and release the tubing from the mask.This design is long in coming for CPAP masks. The squeeze-tab elbow makes connecting and disconnecting the hose to the mask a breeze. Just squeeze the sides of the elbow to release the hose.