All Quechua tents are validated in a laboratory (whole tent under 200 L/hour for 3 hours), as well as in the field.
(2000-mm rated PU-coated polyester flysheet, 120g/sqm polyethylene groundsheet, all seams are sealed with thermobonded tape). A breathable polyester bedroom under the flysheet means you don't come into contact with the condensation that forms naturally on the inside of the flysheet.