Designed for Apple Airpods 1 & Airpods 2 charging case,because of its light and thin, it needs to adjust the top to fit 100% at first use. Precision molded for great fit. Protects your AirPods against bumps and drops. Soft and smooth, protect your Airpods charging case from scratch, dust and dirty. Easy to install and remove,don’t need to take out of the case when you charging. Made from great quality silicone raw materials, it has no pungent taste and no odor.