Memory foam is enjoying an explosion of usages at the moment. It’s being used in high-end hill and mountain hiking boots to provide better ankle support and a more comfortable walk, for example. In medicine it’s being used to decrease the chance of seriously incapacitated patients developing bedsores and long term pressure injuries. Memory foam mattresses, pillows, mattress toppers, and cushions are now common, and becoming more so every day.

It’s been around for a while, and the reason we are seeing it so much these days is that the price has come down so much. Moving from a high-tech super material developed by NASA to a commercially viable material takes some time. Memory foam manufacturing has evolved and become more efficient, and therefore cheaper. So now, the benefits are available to the makers of all kinds of memory foam products, without driving up the price of the final items too much.

The most important property of memory foam is the way it shapes to the body. Whether lining the ankle of a boot or in a mattress, the heat that any living person gives off will warm the foam and make it softer. It’ll shape itself around the body, given a little time. Imagine lying on a sandy beach in a perfectly you-shaped hollow. In the same way, a memory foam boot will shape around your ankle bone. That means your foot is less likely to move around or twist and turn inside the boot.

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