MacRumors posted a review on the Twelve South New AirSnap Protects Your AirPods Case
A quote from the article:
Twelve South last month introduced its newest product, the AirSnap case designed to work with Apple's AirPods.Twelve South New AirSnap Protects Your AirPods Case Review
Priced at 29.99, the AirSnap is made from a supple, full-grain leather that molds around the AirPods for a perfect fit. The fit is tight enough that I had to put a little effort in to stretch it to snap the case shut, but like all leather, it will loosen over time. Expect it to change in color too, because as you use it, it develops a patina.