The Span America PressureGuard Protocol Features: Patented microclimate management (“Low Air Loss”) with alternating pressure that is designed to treat through stage IV pressure ulcers. “Float” mode provides powered flotation therapy. Simple comfort adjustment includes settings such as “Max. Immersion” for patients under 120 lbs. Selectable audible alarm and indicator light for notifying when there is low pressure. “Auto Firm” function for a timed 30 minutes adds stability during transfers, ADLs & CPR.