The Fox Main MTB Goggles Iron are designed for mountain bikers, offering both functionality and comfort. They fit full-face and 3/4 shell helmets and provide a wide viewport for excellent visibility. The Variable Lens System (VLS) allows for easy lens changes, supporting both standard and injection molded lenses. With triple-layer face foam and a non-slip silicone strap, these goggles ensure a secure and comfortable fit, making them an excellent value for any mountain biking enthusiast.