The LensCoat Hoodie helps protect the front element of your lens from dirt, dust, moisture and impact. The neoprene Hoodie fits easily and snugly around your lens hood or shade in either the shooting position or reversed. The Hoodie features a reinforced removable front element protection disc made from rigid plastic and firm foam to further protect your glass from damage. Great for travel and storing your lenses. Medium fits lens hoods from 3.75" to 4.25" in diameter.