RAF Blue paint over solid brass frames for the unique, stylish look. The nose bridge screw is made from brass and offers fine adjustment. Additional padding an comfort over the basic RAF goggles. The lenses are made from a good quality polycarbonate that is treated with a scratch resistant coating to prevent damage to the surface. Each lens is housed in an independent frame that can be easily removed from the goggle to allow replacements to be fitted or to simple switch them with tinted lenses if the sun happens to be shining.