This reflective band of the brand WOWOW can be put around almost anything thanks to the velcro closure.
Ideal for a child seat on the back of the bike to do or around bookbag, pannier or backpack. You can even just wear it around the body. Also handy for wheelchair users.
Not a high technology invention but really practical and efficient. The reflective stoke ensures that you are well seen in semi-darkness/night.
The band is 11 cm wide and 95 cm long.