Two signals, one reason they are hard.

10 temperature sensors sit across the garment, with an eleventh in the DPU - 11 in total.

The point is not the count, it is the geometry. A single temperature reading is a scalar. Multiple readings distributed across a surface give you a gradient: which regions are accumulating heat, which are shedding it, and how asymmetric that pattern is between left and right, upper and lower.

That asymmetry is the interesting part, and it is only visible if you have more than one point to compare. A wrist device has one sensor on a limb. It is not that its reading is wrong - it is that one point cannot describe a distribution.

Ascendra One measures distributed skin temperature. It does not measure core body temperature, and we do not claim it does.

Distributed sensing in apparel has been tried repeatedly. The failure mode is usually the same: the electronics survive the lab and not the laundry, or the garment is technically impressive and horrible to wear.

Ascendra One is built in an 80/20 nylon/spandex fabric with the sensing layer integrated at the design stage rather than added afterwards. Nothing clips on, nothing shifts mid-session, and you stop noticing it in about a minute.

The DPU detaches before washing. Every component that cannot get wet lives in that one removable module, and the garment goes in the machine like normal technical apparel.