External Battery Charger for FreeStyle Comfort Portable Oxygen Concentrators 1137970 Two headgear sizes -- Standard

Two headgear sizes -- Standard & 'RS' Reduced Size -- are available

personalized sleep therapy experience

The minimal contact

Medium & Large) so you'll find your best fit right out of the box

This gray FlexiFoam Cushion is designed for use with all FlexiFit 407 (HC407) Nasal CPAP and BiPAP Masks

External Battery Charger for FreeStyle Comfort Portable Oxygen Concentrators 1137970 Two headgear sizes -- StandardThis External Battery Charger is the ideal companion to your FreeStyle Comfort Portable Oxygen Concentrator, allowing you to keep multiple batteries charged and ready for use whenever you need them. Each Battery Charger comes with an AC Power Supply & Cord for easy charging.