>>2728231NTA
You’re new, so I’ll explain what most of us consider to be basic bitch camping 101.
Most air outside of very high elevations and deserts contains a high amount of moisture in the form of humidity. That air is trapped inside of your shelter. As the night progresses, outside ambient temperature drops, the temperature inside your shelter increases, and the surface of your shelter cools down. When the warm, humid air inside of your shelter meets its cold surface, it condenses into droplets.
This is a problem even on well ventilated shelters that use the ubiquitous single wall design like the Lunar Solo. It has a large door and a good sized vent between the floor and the walls around it entire perimeter, and it’s still pretty common to wake up with a small puddle on the floor. Weather is the big factor there (dew point, humidity, wind).
A bivy doesn’t have any ventilation except by your face (unless we’re talking about a bug/net buy and tarp combo, which is the best option for this issue).
>but muh Gor-tex!Gore-Tex relies on evaporation. It requires the humidity on one side of the fabric to be lower than the other; water vapor can pass through the tiny pores in the PTFE layer then evaporate to the less-humid side. If the outside humidity is too high, the process slows (or stops completely). Humidity rises and peaks just before sunrise.
It’s not like you’ll have a gallon of water swishing around the inside of your bivy, but you will be damp. The military doesn’t care because they’re not worried about comfort, and you do t care about comfort because you’re a newfag who desu is camping is supposed to be uncomfortable.
