The Apex Wizard 510 Nasal Mask is for use with Continuous Positive Pressure (CPAP) or Bi-level Positive Airway Pressure (BiPAP) therapy. Without a forehead pad, this innovative Nasal Mask leaves space for glasses-wearers or those with beards, so that reading or watching TV in bed is easy and comfortable even whilst receiving therapy.The 3D-shaped headgear provides a firm seal as well as being comfortable to wear, whilst the flexible connection tubing means it is easy to move during your sleep. A breathable material which is also durable allows a comfortable experience even for side-sleepers, whilst the quick-release tube and buckle headgear clips mean that this Nasal Mask is simple and quick to attach and use. With an ergonomic cushion, this mask redistributes pressure for great facial support. It also features a noise-eliminating exhalation port, for a quiet sleeping environment.Please download the User Instructions on this page for a printable sizing guide, to find the size that is right for you.