Designed to be safe , functional and comfortable , SOLAS reflective tape across the front and back for enhanced visibility . Side and shoulder adjustments create a customized fit in a functional universal size 25lb. buoyancy, The flexible foam flotation pads cover a minimum body area to increase ventilation and promote freedom of movement. Its float material is used the imported material, which surface is like PVC plastic. Such kind products are widely used by seaman who need to work on oil platform.