At first, I thought it was made of flexible plastic, but it turns out to be hard. Nevertheless, it seems to be durable. Quite expensive for what they offer, but I trust Belkin. I don't know if another company would hold up as well at a similar or lower price

Very good, convenient, and lightweight! For a few keys, of course... it attaches well, it's difficult for it to open and for the airtag to get lost