I have a pair of Inmotion Rock shorts that I wear for bike commuting. They are about 2 or 3 years old. When I got home from work today, I noticed the right rear side had a large oil type stain on it. It is oderless but oily. When I checked further, I notice a tag on the inside said that the shorts have a Coolmax HFS pad in them. I think it burst, but I'm not sure. Has anyone else had a similar problem? I have searched the web trying to figure out what is in an HFS pad, and I haven't been able to figure that out either. Does anyone know what my shorts might be covered with??