A life jacket attached with a radar reflector, but not SOLAS approved, to protect workers from drowning and drifting on the seawater by unexpected falling overboard. The radar reflector is stowed in a pocket attached to the life jacket, and can be inflated by man’s breathing. The radar reflector can be searched by ship radar even in dense fog condition. Size of radar reflector : 200 cm x 10 cm when inflated.