Quality and technical info: All eyewear are created on CE marked bases with UV filter and bluelight filters which makes them safe to wear when looking at your phone or computer. These are extremely lightweight. 
Safety:
Even if the adornments do not hinder the vision, I do not recommend that you drive a car while wearing these.
Care:
This is wearable art and should be treated as such. Take care when handling. Avoid anything that can scratch the lenses, like laying them on a table with the lenses down towards the surface. To protect the mechanism of the sunglasses, one should never wear a pair of glasses on the head, like a headband. It will with time damage the mechanism.
Can be wiped with glasses cleaning pads, or a damp, luke warm cloth. 
Due to the size they do not fit in a regular sunglasses case, but you will receive an organza dust bag and storage box for when they are not used.