The main difference between gel padding and PFM Memory Foam lies in the PFM Memory Foam's unique structure. Below is a representation of the cross sectional cellular structures of conventional gel padding and PFM Memory Foam. Immediately the physical differences are apparent:
Gel Padding
PFM Memory Foam
Conventional gel padding, has a low density closed cellular structure. Conceptually, it's like millions of tiny ballons packed tightly together with very little space separating each one.
PFM Memory Foam, which is used to construct the Palm Swell®, utilizes a high density open cell structure. Conceptually, it's like billions of balloons with valves to their neighbors to allow air to distribute.