2 mm thick provides reliable protection and the change in the size of the AirPods is almost imperceptible.
The silicone from which the case is made is gentle and pleasant to the touch and the additional external coating protects against the effects of wear such as yellowing or staining.
To protect the AirPods socket from moisture and dust, the case has a special cap. It also comes with a snap hook, which is included in the kit, so you can protect the case by hanging it on a backpack or key lanyard.