09-15-2022, 05:40 AM
The heart rate sensor window is clear plastic, stuck to the back cover. Depending on how well I align it when I put the back cover on it sometimes looks like there's some pressure on the back, raising the middle of the window slightly. It's seem most easily if you view at an angle to see the distortion of the reflection on the window. I could imagine this leading to a leak over time. Since I stuck the back on myself I've assumed it will leak, but between sweat and rain it's been ok so far.