Diabetic neuropathy is the leading cause of amputation due to foot ulcers, costing the U.S. alone more than $10 billion annually. Now, students have developed SenseGO, a machine-washable sock containing dozens of micro-fabricated pressure sensors. Changes in pressure are registered as electrical signals and relayed to a smartphone app, which informs the patient of developing risk. By giving patients the tools to prevent the development of foot ulcers, this can dramatically reduce health care costs related to diabetes.