Garmin Vivosmart 4 great for 6 months then developed contact dermatitis from strap. No replacement strap possible ( good way to make people keep buying when the strap breaks). Product support suggest due to moisture build up, but no idea how this relates to 6 months wear with no issues. I think maybe the plastic strap is degrading releasing toxic irritants!! The strap is leaving livid red burn marks and then the skin peels off. Will never buy Garmin again!!
