The Realtree Max5 TravelCoat Lens Cover for Sigma 300-800mm f/5.6 AF Lens from LensCoat is a 3.0mm thick shock-absorbing closed-cell neoprene lens cover. It is designed to fully protect the lens when not in use, without the need for a more comprehensive lens case. It allows more valuable room for packing and storage. The cover simply slides over the lens, and closes with a secure touch fastener. The Realtree Max5 is a detailed camouflage pattern that features cattails, millet, milo, corn stalks, sunflowers, oak and maple leaves, cedar and oak limbs, plus a variety of other plant life.