Needs all parts and instructions
The package did not include any instruction on how to use it.  Nor does the Amazon picture depict anyone using it.  So I first had to decide whether the opening part would face front or back.  I chose front but am not certain if I am correct.  The package did not include the pump and its metal clamp depicted in the picture.  I had to use my mouth to blow it up.  (it did have the blue plastic clamp to keep the air from releasing).  I have used it for a 2 week period and it feels comfortable, but I am going to send it back because it does not have the pump.  I called Amazon and they are unable to get the pump separately.
Rating: 3 stars