Hi smmimp14,
You might want to take a look at the topper reference post here. In that post are links to information about fiber toppers, as well as guidelines for selecting a topper, and specific guidelines for selecting a latex topper.
The overall feel of a topper is determined to a large degree by the surface upon which it is placed, but in general fiber toppers compress more and don’t provide as much pressure point relief as higher quality foam toppers, such as latex or higher density memory foam. And at a higher BMI, a fiber topper may be even less effective.
Phoenix