I put two of these on bottom of macbook to elevate the back. It gives better air circulation under mac to prevent overheating, and comfort for typing on keyboard. Looks integral to the case. AirTag case is stiff enough you only need to fill with one AirTag. Or use two airtags to make it look even. I have one airtag associated with my phone and other with daughters phone. This way either of us can track if thief makes off with it. I do wish apple had a built in airtag on Macbooks and brought back the security hole to cable lock the macbook to a table. Also wish case makers would have a apple tag slot built in. Time will tell how well the adhesive holds up with sliding macbook in and out of backpack.