This professional life jacket features a premium 300D Oxford polyester outer layer with high-density polyethylene foam core, providing 7.5KG buoyancy support suitable for rescue personnel weighing ≤100KG. Equipped with a professional rescue whistle that delivers effective distress signal transmission in noisy flood rescue environments. The high-visibility bright orange design with shoulder reflective strips ensures clear visibility in various complex lighting conditions, specially designed for flood disaster rescue and high-intensity scenarios, with distress signal penetration reaching 95 decibels and rescue identification rate improved by 89%.