The I.K. 91 is an ultra lightweight (34 grams) and very comfortable goggle. It's designed to protect against wind, dust, dirt, mud, and more. The tinted spherical lenses give you a great distortion free view with totally unobstructed peripheral vision. The narrow headband fits well under or over helmets. All IK91 Lenses are 100% UV blocking and impact resistant. This goggle comes with its own microfiber carrying case.