Review on Flare Lightweight Reflectors Waterproof Accessories by Bim Cook

These are bright reflectors that are clearly visible at night. They're lightweight and inexpensive, and so far going strong. They fold in half to attach to the spoke of your wheel. There are no instructions or guides, so you need to line them up carefully the first time you try them or you'll ruin them. They have a very simple and inexpensive design, which is fine, but there should be a discount if you buy two or more.