Abstract: A protective device suitable to be worn by the user includes a fixing element to fix the device on the user, the fiving element having packs in which envelopes are arranged intended to be filled with gas and connected to the fixing element, the envelopes being additionally connected to sleeves, all the envelopes forming one volume, a cylinder with pressurized gas, having a valve, the outlet of the valve being connected to the envelopes, a measuring device to register the displacement parameters of the user, the measuring device being coupled with the valve, a set of measuring sensors, wherein the valve is suitable to fill the envelopes with gas automatically at the time when the measuring device detects that threshold values for displacement of the user are exceeded, the envelopes, upon inflation, enclosing the user so that they protect the entire user's body.