1. Material: protein skin, sponge 2. Features: close to the ears, good sound insulation, anti-slip, flexible, breathable and comfortable 3. Process: high-frequency thermocompression edge banding 4. Built-in rebound sponge, isolate the external environment, comfortable to wear 5. Using high-quality protein leather material, the leather is softer and thinner 6. Knob type installation, simple and convenient operation 7. Designed according to human body acoustics, 360-degree ear wrap, good sound insulation 8. Weight: about 9g/pair