I received some of the ULCANS netting from Old Grouch. First, the individual size 3' x 6.5' is not real usable for evading a thermal viewer, as it is just too small, unless perhaps, you were using it over a trench, or laying flat on the ground. Otherwise, I don't believe it would provide sufficient coverage. This ULCANS netting is a porous mesh covered with bits of of material to resemble leafy foliage, much like many types of hunting camouflage.
So, how does it work? Is it effective at concealing a thermal signature? That's a negative Ghostrider! I'm not impressed.
My lovely assistant agreed to help me last night so that we could check the effectiveness of the netting. The ambient temperature was 40 degrees F (3 degrees C). We didn't stay outdoors too long because of the temperature, and the chorus of some nearby coyotes.. Using a PVS-14, the netting is effective for camouflage, especially in the monochromatic display of the night vision device. It would blend in reasonably well used at night, when it is viewed by the naked eye or a night vision device.
I then tried looking at it with a very low resolution thermal sight, a Torrey Pines Logic T-12N. The Torrey Pines Logic T-12N is about as basic as you can get. I like them because they're extremely portable, and they're relatively low cost. I use mine to keep an eye out for coyotes and bears when I'm doing things in the yard at night. My assistant was dressed in a hoodie and jeans, with the camouflage netting draped over her. Using the thermal sight, I was able to plainly see her silhouette through the netting. I was even able to see her face, and hands, as they were not covered by any clothing. So, I'd say the ULCANS is not effective by any means at concealing a human. After this experiment I would certainly not expect to use it in a life or death situation if I expected opponents to be using thermal sighting devices. I'll continue my search for a more effective thermal concealment. The netting could perhaps be used in conjunction with a better thermal barrier.