might let in moisture from underneath if the ground is damp
But doesn't the 3000mm HH rating mean it won't?
Might just get a lighter tent then. Currently got a crappy 2/3 man.
Edit: I think you're right about the waterproof zips. But it does have a large flap which covers the zip. Meaning most water (if from above) won't get near it.
I have read about cheaper bivis having a bit of seep at the bottom.
If you're going to use it with a tarp it should be fine, as it is essentially just a wrap around groundsheet. At least with the zips you can regulate the moisture inside a bit so it doesn't get too humid in the bag.
But doesn't the 3000mm HH rating mean it won't?
Might just get a lighter tent then. Currently got a crappy 2/3 man.
Edit: I think you're right about the waterproof zips. But it does have a large flap which covers the zip. Meaning most water (if from above) won't get near it.