Saw a bike with some of them and they were brilliant, really stood out and when the car headlights were on it, it looked like a 4 inch beam of light around the wheel. I think they will be the 3M ones.
Yep, the advert says they are made of 3M material:-
http://www.aldi.co.uk/uk/html/offers/special_buys3_26726.htm
My commute is mostly rural backroads which are completely unlit so these should help with visibility to other road users when their lights hit me.

