Retractable Suction Cup Car & Home Sunshade Roller Blinds.

Narrower than stated, the suction cups hold very poorly, sticking them to the window is quite a quest.

Reflector. I order it for the 3rd time. I really like this option. I recommend it.

The construction of the curtains is high quality. The seller shipped the item quickly, as indicated in the 1+1 format (meaning the second identical item is free). The mounting is vacuum-based, however, in order for the structure to hold securely and work for raising/lowering, I used a life hack by lubricating them with dish soap, then everything securely attached to the glass. Additionally, there is an option to trim the curtain to width yourself. On the outside, there is a layer of aluminum that reflects sunlight.

Couldn't hang it up - it doesn't attach to the window. One of the mounts fell off immediately.