Features: l Made of high-quality silicone material, soft and comfortable, safe and nontoxic l With fine workmanship and exquisite appearance l High performance and high durability l Make your bluetooth earphones easier and more convenient to carry l Four colors for your choice Specification: l Material: Silicone l Color: F1 Black/F1 Blue/F1 Red/F1 White (Optional) l Applicable Model:Sony WF-1000XM4 Bluetooth Headset Package Includes: 1 x Anti-Lost Rope Note: l Anti-lost rope only, other accessories demo in the picture is not included