Why does a wool throw feel warmer than linen? Stack the layers and see

Why does a wool throw feel warmer than a linen one? Most of the warmth comes from still air trapped inside the fabric, and the fibres mainly hold that air in place.

Build a throw below and watch heat escape as you change the fabric, thickness and layers. Thickness and layering beat fibre names, and a few blankets you already own can do a lot.