Purple mattresses have a fairly unique feel, thanks to the presence of the 'GelFlex Grid'. This is the feature the brand built its name on, and it appears in all the Purple mattresses. Of course, none of today's best mattresses are exactly alike, but if someone is asking what it is that makes Purple mattresses special, the Grid is the one thing you won't find anywhere else.
The GelFlex Grid is a square-based grid made from elastic polymer. It melds around the sleeper's body to provide custom support. In the mattress it does a similar job to memory foam, but there are a few key differences. While memory foam is slow moving, the Grid will bounce back into shape immediately when pressure is removed. The open structure also means it won't trap heat like some dense memory foams can.
