Pet Dog Cat UV Protective Foldable Sunglasses Lenses Eye Wear Protection with Adjustable Strap (White) Material: Plastic; For dogs about over 15 lbs, not for mini pets ! Head elastic band minimum82mm/3.20", max 170mm/6.69". Neck around 95-190mm/3.71-7.41" between the pet can be worn. UV protection and prevention are key to your pet's healthy eyes. Shatterproof Lens. Anti-fog is available, protection against UV/wind/water/debris.