Compatible with BMW 1 Series 2 (II) F20/F21 I 2015-2019 - UV and insect protection: This premium sunshade for the side windows is made from breathable double-layer nylon mesh and provides optimal protection for children and pets in the rear seat. It blocks harmful UV rays and glare and helps keep dust, stones, flying insects and bees away. - Freely liftable window guard: Can be installed inside or outside the rear window frame without hindering window operation. Promotes good air circulation in the car so you can breathe fresh air while driving. - Easy to install and remove sun protection: Slide the shade onto the rear side window frame and pull the curtain down to install or remove quickly. Folds for storage and is machine washable. - Use scenarios: - When transporting children or pets on sunny days, it reduces sun exposure and glare while keeping the window operable. - On long drives or hot days, it helps reduce interior heat and glare while allowing airflow. - When driving with windows partly open for ventilation, the shade stays in place to block dust and flying insects.