LensCoatA(R) for the Sigma 150-600mm f/5-6.3 DG DN OS Sports Lens for E-mount / L-mount LensCoatA(R) Sigma 150-600mm f/5-6.3 DG DN OS Sports Lens for Sony E-mount and Panasonic/Leica L-mount telephoto lens cover offers your valuable equipment some protection from scrapes and bumps, preserving its resale value. It also helps 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.The LensCoatA(R) Sigma 150-600mm f/5-6.3 DG OS HSM Sports Lens cover features a clear plastic windows over the auto focus / stabilization controls and also the lock switch. *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 not seen in picture.