LensCoatA(R) for the Olympus M.Zuiko Digital ED 150-400mm f4.5 TC1.25x IS PRO LensCoatA(R) telephoto 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. The LensCoatA(R) Olympus 150-400 features a clear plastic windows over the limiter switches, auto focus, Image Stabilization switches. There is also a window to access the built in Teleconverter.