Polar A370
25.50 mm, Silicone, M/L
Polar A370
25.50 mm, Silicone, M/L
I also had slight redness at the beginning, but without itching. Since I started wearing the strap more loosely, so that the watch can move a little on my arm, I no longer have any problems. I only tighten the strap a little when I activate the heart rate monitor.