The Exped SIM Lite 3.8 LW is a 3.8 cm thick self-inflating insulating mat, designed for temperatures down to -5C. Its innovative design with horizontal and vertical air channels creates insulating air chambers, optimizing heat retention and minimizing weight.
It incorporates a layer of foam inside that provides basic insulation even in case of puncture. In addition, it has separate unidirectional inflation and deflation valves, which prevent air loss during inflation and facilitate quick and complete deflation.
The outer polyester surface features a honeycomb structure for greater grip and to prevent slipping, while the interior has a PU coating that guarantees airtightness. The SIM Lite 3.8 LW offers an excellent balance between insulation, comfort and lightness, ideal for restful nights in the mountains.