Could not use in car in summer
This seat cushion can not be used in your car in the summer, as the heat will destroy the jell in the cushion.  I even tried placing the cushion in the trunk when going into stores; but the cushion can not be kept cool enough to not be damaged.  I purchased this cushion mainly for vacation trips.  Plus the cushion hit my lower leg wrong, causing more pain.  The coolness of the cushion feels could at first; but does not last.  I would not recommend this cushion.
Rating: 1 stars