This pillow is not too bad but I have concerns, I sleep on your side with one arm under the pillow, below it's pretty cold and it is unpleasant (unlike above the pillow there ' no foam). When I sleep in this way the water from one side (I have filled with 3L), I would have completely fills the No but I love it too hard pillows. It is a bit like when I 'leans on my pillow to watch TV. Side versatility there better. This is my first water pillow and I'm not convinced that with a foam pillow.
