I started running at night in a rural area and didn't fancy being hit by a combine harvester so I invested in this and a head torch (LED Headlight - Ring Cyba-Lite
) to complete the look. Now children poipnt and giggle but at least I'm alive.
Very light vest and certainly bright. Felt a little tight on me but not to the extent it was uncomfortable.
The elastic straps ensure the vest doesn't move about too much or ride up in a coquettish fasion.
If you want to be seen get one. Or run in daylight.