Made of soft rubber material which covers your binoculars lenses from the dust and rain. This product comes with two front caps and one connected back lenses rainguard. It is very important to say, this product fits all models 10x42 binoculars however, if you take a close look at the diameter, you can see if it fits your model too: Front lens diameter: Inner:54mm - Approx - 2.05 Inches Outer:60mm - Approx - 2.36 Inches Back lens rainguard diameters: Inner:41mm - Approx - 1.62 Inches Outer:45mm - Approx - 1.77 Inches