Will it go soft or flat over time? Simba - Odyssey July 06, 2018 13:07 Updated Follow Not at all, the memory foam inner will continue to respond to and support your head for many, many sleeps. Related articles Isn't memory foam hot for a pillow? How firm is the pillow? What is the pillow made of? What kind of pillowcase can I use? Are you environmentally friendly and is the mattress vegan?