Here is a smart bra from Adidas that senses your heart rate without a separate chest strap. The Smart Bra has heart sensing technology knit into the fabric. You can use it with the companion app to get proper heart rate coaching.
The bra is comfortable to wear and turns your phone into a personal trainer. It is available in small, medium, and large sizes.
*Disclaimer*Our articles may contain affiliate links. As an Amazon Associate we earn from qualifying purchases. Please read our disclaimer on how we fund this site.