WHY O2 FLOW?                                                  •Superior protection                                             •Reusable                                                             •Comfortable                                                       •Multiple uses beyond Covid-19                                                                                                      KEY FEATURES • Replaceable 4 Stage filter: HEPA H-13, Carbon  • Natural breathing with 2 speed fan  • Comfortable silicone face and ear loops  • Can be sterilized for reuse   PRODUCT FEATURES • Effective Protection • 98.8% purification efficiency • Reusable • Filter is replaceable • Unit and pieces can be sterilized • USB Rechargeable Lithium ion battery • Comfortable to wear • Silicone fits to face • Double speed fan to effect normal breathing, even when exercising • Soft adjustable ear loops • Exhaust valve • One size fits most Active fresh air system, built-in long-acting ultra quiet micro-motor wind wheel.