Great idea and a great product; I'm glad of your initiative.
Personally I would look for a different kind of thing. I always wondered what down booties were for, other than for around a chilly house, until I moved to Europe and started sleeping in refuges. The mountain huts encourage you to remove footwear. They are often supplied with slippers of some kind, which are OK for summer, but in fall winter, down booties with closed cell foam beds and abrasion-resistant bottoms make shuffling around freezing cabins much more tolerable. The same would be useful mountaineering, but a good friend had to rescue a client who slipped 1000ft down Mt. Ranier after stepping out of his tent in such booties, so I'm wary of them in that application.