Will it go soft or flat over time? Simba - Odyssey April 10, 2018 22:06 Updated Follow Not at all, the memory foam inner in both pillows will continue to respond to and support your head for many, many sleeps. Related articles How firm is the pillow? How big is the package it arrives in? Do I need to wait for it to inflate like the mattress? Isn't memory foam hot for a pillow? Can I buy the protector in John Lewis? What are the pillows made of?