Anyone here have any experience with Warmlite bags?
I'm specifically interested in what others think about their approach to keeping their down bags dry.
They claim that a vapor barrier material INSIDE the bag is the only real way to keep a bag dry - claiming that most moisture problems in bags are the result of the bag becoming wet from the inside, NOT from the outside. So they make all their bags with a VB inner shell, and a breathable, uncoated outer shell, with a DWR finish.
Among the claimed benefits are:
- Dry bag, since sweat vapor cannot enter the bag from the inside.
- Dry bag means you don't carry a progressively heavier bag on a multi-night trip (from each night's sweat slowly making the bag heavier and heavier).
- Bag is protected from damaging salt and oils.
- All of the above is better for the useful life of the down.
- VB adds about 10 degrees to the comfort range.
Most people I've spoken with, however, only use VB for cold or very cold weather. But it seems like the claimed benefits would extend well beyond cold weather, and that one really WOULD want VB all the time...
Anyone know anything more about this? Pros? Cons?
Aside: I'm asking because I'm planning to make a custom three season, sub 1.5 lb "comforter" style blanket as part of a sleep system for a couple, and I'm trying to decide whether or not to go with a VB fabric for the inner shell, or to go with the standard lightweight nylon that everyone else seems to go with...