About this item Compatibility Compatible with Sport X20, Space A40, P20i, P30i, P40i. Slow Rebound Sponge Memory foam is a polyurethane foam with slow rebound sponge. It will be distorted when pressed and typically needs about 1-2 minutes to fully recover. Dont worry. Long Lasting Comfort High-quality soft foam provides 24-hour comfort and alleviates ear pain caused by silicone tips. Ensures long-lasting comfort for your ears, great for running, cycling, working out at the gym, and more. They are comfortable for extended wear. Nice Sound Quality These ear tips provide a good seal to reduce outside noise, allowing you to focus on your audio and enhancing your listening experience. Storage Box Includes a storage box for 6 pairs of ear tips; ear tips only, earphones not included. Dimensions: 2.3 x 1.8 x 0.5 inches.