To me, it was Aidlab, a smart chest strap that collects and analyzes various biosignals, which I co-created.

This is a picture of my co-founder Karol and me, holding the first prototype of Aidlab : https://qph.cf2.quoracdn.net/main-qimg-44d4794da932b128c2bf6...

(plot twist - it wasn't a chest strap at first haha)