Firewall MTB are cylindrical goggles with a single lens and retro inspired design! The goggles offer one of the best fields of view in its class and they have a seamless fit with both Sweet Protection's Fullface helmets and their enduro/trail helmets. The frame is made of TPU and has a triple layer with foam to be adaptable to your face and the lens is oil and water repellent! Make sure you see clearly on the trails this summer!