An inflatable PFD has less bulk and interference than a foamunit, but is ready to provide flotation during an unexpected entry into the water.
可膨胀的PFD有较少的体积和没有了干扰泡沫单位，但在想不到的进入水后实时提供漂浮。
2
The unit has 3 foam hand grip locations and padded tubing where the unit contacts with the door frame.
该单位有3个地点和泡沫填充握管其中与门框的单位接触。
3
The device is a pre-molded polymer foam liner that is placed inside the bathtub or shower unit and that is then removed upon the completion of the construction.