A double layer hammock gives you the option of sliding a ground pad between the layers of fabric and will hold your ground pad in place when you scoot/move around in your hammock.
This arrangement gives you a lot of insulation options.
We have used this feature for a long time with great success.
For even MORE double fabric layer design engineering, take a peek at our dp Ultimate Hybrid hammock. www.dplightweightbackpackinggear.com
I might add, we keep tweeking/improving our gear when we see areas that can be even better.
FYI: Much to my wife's frustration, I use and sleep in our gear on average 10 nites a month dreaming of improvements ...
And for asking about us, how's a 10% discount with ANY single item we sell before May 1st, 3013 ?