Anticipating a level of discomfort on a planned 15 hour plane flight, I bought this cushion. Normally economy class seats leave me sore and stiff and unable to sleep, but this cushion made all the difference in the world. With the cushion in place I managed to sit for hour after endless hour, reading, watching movies, and getting quite a bit of sleep. I dreaded the long flight, but actually ended up enjoying it, and even arrived quite bright and cheery the other end. Thanks! ..More