HD-A1 First aid medical rescue head immobilizer for spine board stretcherHD A1 First aid medical rescue head immobilizer for spine board stretcher Technical features: 1)The head immobilization are made of high density plastic, both sides have an ear hole. 2)It can be used simultaneously with a scoop stretcher or PE stretcher. 3)Waterproof plastic coating makes it easy to clean and prevents bacterial growth on it.