easyCover Lens Oak in the color black, specifically designed for your Sony FE 100-400mm F4.5-5.6 GM OSS. The Lens Oak protects your lens against bumps and scratches while it remains fully functional. It is made of Neoprene material: soft from the inside and water resistant on the outside. Easy to install and it keeps your lens as new! Also available in the colors black, brown camouflage and forest camouflage.