LensCoat Nikon Z 100-400 lens lens covers offers your valuable equipment some protection from scrapes and bumps, preserving its resale value. It also help break up the shape of your lens, making it less noticeable to wildlife. The neoprene LensCoat acts as a thermal barrier making the lens more comfortable to handle in hot and cold tempertures. *This cover comes with an optional zoom sleeve that can be used to cover the lens section that is exposed when the lens is zoomed.