Compatibility: The memory foam replacement ear tips compatible with DEWALT Neckband Headphones ,not for DEWALT Heavy Duty True Wireless Ear Buds. Material: Memory Foam, comfortable and soft, no ear pain for long time. Securely Fit: Firm and not easy to fall off. Slowly Rebound Sponge: The memory foam tips will be deformed and ugly after pressing, about 60S to fully recover. Package Contents: You will get 3 pairs foam eartips with S/M/L. The foam eartips , slowly rebound, soft fit, no ear pain for long time.