Hi Dan and EJ, i essentially agree. It would probably be a good idea to limit it to a few of the best ideas/concepts, and yes, i definitely want to involve some testers from BPL.
"One note on Apex - some say that since Apex was designed for greater breathability, it's less warm. I would think that if you use it with less air permeable shell fabrics, it will be just as warm as Primaloft One, but you should look into this. I haven't read up enough on it yet."
It is, but the idea for the vest is to have the option for active wear insulation garment that dries quicker and doesn't wet out as fast to begin with, that will provide just enough insulation for those more extreme temps, for people who run colder, or those times where you're out but not expending as much energy for whatever reason. It's not meant to replace your basic camp insulating clothes like a down jacket or parka, and so, the more breathable the better generally speaking. It's also meant to be used in combo with either a windjacket or rain gear--within a larger system.
I've found that pretty much, no matter what i wear, i almost always sweat on my back, because of a pack. Having just one baselayer, a vest with a thin one layer back, and a windshirt should help to cut down on that.
I'm testing my front only insulated Apex vest Monday and Tuesday, since it will be unusually cold here. Low is suppose to be around 0, and the high the next day 16, so it will be a good time to test it. In my case, i will be using the Pat Cap 4 hoody as a baselayer for these temps, and a windjacket. Chances are, unless it's real windy, i will be able to keep open my windjacket, helping to keep the rest dry and warm.
Btw, my prototype Apex vest, weighed a bit more than i thought it would, but i did make it a little over large. I'm going to have to get some patterns or take measurements in the future, but anyways, it came in around 5.5 oz i think. It was made with 1.1 oz ripstop nylon, 2.5 oz Apex, and some Polartec Powerdry high efficiency baselayer fabric.
I think it's an ingenious idea, but then again, i'm a little biased.