Glass-on type that can be attached to a helmet and used over glasses. Safety goggles can be attached directly to the helmet. The goggles do not touch your face directly, so your ears and nose will not get sore or slide out of your nose. Reduces 99.9% of harmful UV rays (UV). Ensures a wide field of vision: It is attached to the bill of a helmet or cap to ensure a wide field of vision. In addition, it is a glass-on type that can be attached to the top of your glasses. Lens Adjustment: The lens can be adjusted up/down, forward, and backward depending on the user, and you can change the angle to flip up when not in use. Manufactured in an excellent factory that has cleared the world standards; ● This product is 100% produced in a factory that has been certified to strict international standards ISO9001:2000 that assumes the quality of the product. The ANSIZ-87 quality is reliable and made by excellent technicians who are responsible for all their manufacturing. Lens: Polycarbonate; Hard coated treatment/(3H); Lens thickness: 0.09 inches (2.2 mm); Lens position: front and back, 0.8 inch (2 cm); Adjustable angle; Clip: Supports knee length over 1.8 inches (4.5 cm); Patent registered (Patent No. 3548743); R.