Wearable airbag

A wearable airbag system, comprising:

• an inflator;
• a main body configured to wrap around a neck area of a wearer;
• a cushion accommodated in the main body;
• an airbag controller configured to control the inflator to inject gas into the cushion for deployment to a head area of the wearer;
• a tether accommodated in the main body;
• a first string connected to one side of the tether and partially exposed by passing through the main body;
• a second string connected to the other side of the tether and partially exposed by passing through the main body;
• a first length adjuster coupled to the first string and configured to adjust an exposed length of the first string from an outside of the main body;
• and
• a second length adjuster coupled to the second string and configured to adjust an exposed length of the second string from an outside of the main body.