Just to share, I use this to improve the sound isolation. The best part, it is fit in the case. Superb!
New Fashion Color 2 pairs Soft Ultra Thin Earphone Tips Anti Slip Earbud Silicone Earphone Case Cover For Apple AirPods Earpods
https://s.click.aliexpress.com/e/bvT1329w
New Fashion Color 2 pairs Soft Ultra Thin Earphone Tips Anti Slip Earbud Silicone Earphone Case Cover For Apple AirPods Earpods
https://s.click.aliexpress.com/e/bvT1329w