Specifically designed for your Sigma 150-600mm F5-6.3 DG DN OS Sports (Sony E). The Lens Oak protects your lens against bumps and scratches. It is made of Neoprene and Nylon material: soft from the inside and water resistant on the outside. Easy to install and it keeps your lens as new. This product is made by easyCover, a company based in Rotterdam, The Netherlands. Started in 2006 as a student project at Erasmus Universiteit Rotterdam (Rotterdam School of Management). We develop and sell camera accessories for more than 16 years now. Since 2006 we have presented our products all over the world, on tradeshows like CES, PMA, Photokina, SalondelaPhoto, PhotographyShow, CP+, PhotoPlus and PhotoExpo. You can buy easyCover in more than 80 countries now. This is possible because of our broad network of partners Our goal is to make it possible for everyone to enjoy photographing to the fullest without the fear for scratches or breaking their camera and lens. For more information go to our website www.easycover.eu or drop us a message via the socials. On Youtube we have a list with movies per products.