Features: Mesh version advantages: refreshing, breathable, comfortable and not easily deformed. disadvantages: not resistant to dirt. Cooling gel version advantages: stain-resistant, durability. disadvantages: not breathable. Easy Installation: Replace your worn-out ear pad cushions, simply remove Enhances Sound: provide exceptional noise isolation and comfort, making them essential addition to your portable auditory setting. For audiophiles, music enthusiasts, and professional upgrades their headphone accessories for improved comfort and sound isolation. Specifications: Size：about 9.5x5.50cm/3.74x2.17in Compatible Models：HQ51 HQ30 HC905 Package：2PCS Replacement Ear Cushions Component：Mesh/ Cooling Gel Package Includes: 1Pair Earpads note: Replacement Earpad Only, Headphone Is Not Included Please allow 1-2cm errors due to manual measurement,please make sure that do not mind before order. Due to difference between different monitors, the picture may not reflect the actual color the item.