Thermarest Fast and Light Series

The Thermarest Fast and Lite series are designed for lightweight backpacking, expeditions and mountaineering.

They are the lightest mats in the Thermarest range.
The Thermarest Prolite 3 series is 3cm thick, this is the lightweight choice. The Thermarest Prolite 4 series is 4cm thick, so a bit heavier, but warmer and more comfortable.
The Thermarest Z lite is a lightweight folding foam mat.