Wide Mask Clip

Inspired by https://www.thingiverse.com/thing:4264791 but designed from scratch, this mask clip aims to help relieving the ears even more by not only connecting the rubber bands behind your head, but also separating them as far as possible.
Every inside and outside corner is rounded, it is thin and flexible enough to bend around your head, and it is easily customizable in length (nicely) and width (less nicely). Once printed, you can choose from two hook pairs on each side for adjusting length.
Sadly, it still can't circumvent the fundamental design flaw of human heads that simply aren't flat enough on the back side for being suitable for face masks.
Experiment with the optimal length for your head!