Features: Specially designed for: Osmo-Action Help to reduce the wind noise, enhance audio capture performance in windy environments or high-speed riding activities to get a better video recording. Environmentally friendly, soft and flexible, good stretch easy to wear on and removal. Secure fit, precise hole would not impact the noise reducing capabilities. Adapt to various of scene and sport, even the gale weather & strenuous exercise. Package Includes: 1xWindslayer Cover Specifications: Material: Sponge Size: 7x5x8cm/2.76x1.97x3.15inches note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.