I was excited to receive these pillows as my old ones were not very supportive and I often had neck pain. While these new ones are super comfortable as soon as I opened them there was a terrible off-gassing/chemical smell. I let them sit out - uncovered for over a week and they still smelled terrible. It's now been 3 weeks and I can't sleep on them as the Oder permeates through both the pillow cover and the pillow case !