On Friday night at MAHHA, Thing1 and I spent the night at 48*F, each of using a single layer IX UQ. We also had the new 2QZQ UQ Protector under us.
On Saturday night, it got down to 32*F. Thing1 was toasty with Knotty's HH SS OCF pad and a single layer IX UQ. Dutch and I each used two layer IX UQs. Mine had the 2QZQ UQ Protector; Dutch did not. Dutch had far better top insulation than I did. Dutch said he felt it was about 5*F too cold, but when he awoke, he was surprised to learn that it got to 32. In the middle of the night, I added an IX sit pad under my hammock. We were both pleased that the IX did so well!
I have decided to add a 2'X3' IX torso rectangle to the bottom of the IX UQ. I'll add it as a differential layer, so it will have the proper gap. When you nest two IX UQs, there will be four layers of IX under your torso, with built in gap.
I've also decided to eliminate the weight of the binding, and use a rolled hem instead. At each dart, I'll insert a piece of scrap IX for edge strength. Losing the grosgrain binding will make up for the added weight of the torso rectangle.
This will be called the Molly Mac Gear MAHHA IX UQ. All outstanding orders will be MAHHA IX UQs, including the UQs that BigBamaGuy will be testing.
Later, I'll add down to the torso rectangle, and see if it is worth doing.