What is the material of the Headdemock?

The frame of the Headdemock is made of metal and rubber and the filling of the hammock is 100% Polyester Fiberfill.

Headdemock:
The Headdemock is made of polyester.

Headdemock Superb:
The Headdemock Superb is made of Sunbrella or Olefin. What is Sunbrella or Olefin?