From the description:
“In an emergency an improvised Occlusive Dressing can be a life saver. It’s best to have a real one in your kit. they run about 25 bucks.
and you could easily make out of plastic and tape. But I carry this and a cheap extra.

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Disclamer:
I am not healthcare practitioner or provider. To the extent that any information is provided through this video, it is for general informational purposes only and is not intended to constitute or substitute for medical advice or counseling, the practice of medicine including but not limited to psychiatry, psychology, psychotherapy or the provision of health care diagnosis or treatment, the creation of a physician-patient or clinical relationship, or an endorsement, a recommendation or a sponsorship of any third party product or service, agents, employees, consultants or service providers. If you have or suspect that you have a medical problem, contact your health care provider promptly. Information and statements regarding dietary supplements available on this video have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease.
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