It's certainly about efficiency. I know that the concept of putting a sleeping bag, I mean sleeping bags exist now. And having seen many of the prototypes for the 'Embrace Sleeping Bag' and their incubator product, I'd hesitate to call a lot of what they did 'simple'. Because they did do a lot of work but there's a certain elegance and sort of efficiency in saying: 'Okay, maybe a simple solution or a simple approach can lead us to a more incisive sort of attack at the problem and we can leverage kind of existing technology, you know. What is a sleeping bag? We know how to sell these things, we're not reinventing a process.' And then I think that's where the design subtleties can come in like, the sleeping bag itself has sort of an insulation material in it, that can be heated up or cooled down so there's certain material science issues that are particular to that solution. But, the concept can be approached, sort by a way of simplicity and sort of a certain elegance