Switch sleeping styles in the middle of the night? Now you can with the solid8 double density's comfort zip pillow. The comfort zip pillow's crafty zipper sides let you change its Firmness in an instant. With the sides unzipped (u), it's moderately firm; zip ( z ) them up and you can pump up the support. If you're a have your cake and eat it too kind of person this pillow will be one of your top faves. After all, why skimp on the sleep-style when you can double dip, do both and get a solid 8 hours of sleep?