Can a type 1 diabetic adult avoid low glucoses and regain hypoglycemia awareness using a hybrid closed loop insulin delivery system? Involvement is 22 months (13 visits) and includes a 4-week Screening Phase and an 18-month Intervention Phase. Participants will undergo 3 Hyperinsulinemic Clamps done at: Baseline (before starting the device and after completing the screening), 6 months (after using the device 6 months), and after using the device for 18 months. This metabolic testing will allow us to measure improvement in hypoglycemia awareness.