The GORE-TEX® laminate for sleeping systems is GAS PERMEABLE.
GORE-TEX_graphic1-03-01All our Bivy Bags and Bivy Tents have the revolutionary gas permeable laminate as their topmaterial. The material is absolutely waterproof, windproof and vapour permeable – the well-known properties of laminates. What’s new is that the new laminate is also gas permeable. That means that the Bivy Bag can be closed completely without having to keep a ventilation slit open for fresh air. The fresh air permeates through the material itself.
The benefits are obvious:
- The warmed air stays inside the Bivy Bag resulting in a much better
insulation effect. When the outside temperature is –10°C, for example,
the air temperature inside the head area is +3°C.
- In really bad weather and precipitation the Bivy Bag can be closed
completely and remains absolutely waterproof.
Highly water-proof and cold-flex durable laminate.
Does „Gas-Permeability“ work under extreme rain fall conditions? Raintower testing of gas permeable, completely closed Bivy Bags – O2 concentration inside head area