1. HIGHQUALITY CONSTRUCTION: Made from polymer material, lightweight and durable, wearresistant. Adjustable head locking strap with hearing protection for easy/quick use. 2. Many builtin foam pads for and comfort, soft and breathable nylon mesh fabric for cheek and head position, 2/3 foam padding, nose bridge protection for comfort and good protection. 3. Versatile design of the NVG mounting/accessory rail plug: The NVG mount is compatible with most GoPro NVG mounts, such as night vision goggles, mobile cameras, and the accessory rail connections provide quick attachment points like flashlights, cameras, and more. 4. The most suitable size: 22 16 29 cm, adjustable shoulder straps, can be suitable for different head sizes. Natural fit, comfortable and breathable, builtin largearea sponge buffer layer, more resistant, more comfortable to use.