Can't be worse

I bought these sunglasses for biking, at Sportsdirect. The price at £20 was not the lowest.
The glasses are a disaster; not only you have to guess or Google how to change the plastic lenses - for those with no experience-, but the frames and the legs come off all the time;you put them in your jacket pocket and when you need to put them on, you need to assemble them first because they just come off all the time.##I could not recommend it less; not only the glasses but anything to do with the brand