The dew, if there is any, settles on top. Very little moisture blows in from the sides. Lots of breeze comes in from the ends and under the sides, also.

In a bad rain, the tarp can be pitched lower and will block it from blowing in. We've ridden out near-hurricane winds and rain with a dry hammock.

For fog and mist, the moisture can be kept off the hammock with the underquilt protector. It's just water-resistant fabric that hangs under the hammock.

Overall, it's very versatile. Here it can be 80F to 20F with 90% humidity and sleep is comfortable with the right quilts, etc.

Check out Shug for some fun and good info: https://yewtu.be/channel/UC27nqmEhKzD9YHK1IFwG7qA