B0087MZIR8 LensCoat Lens Cover for Canon 300 f/2.8 is II Camouflage Neoprene Camera Lens Protection Sleeve (Realtree Max4 HD) lenscoat

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Protection from bumps, dings, nicks, and the elements like water, sand, dust etc.
Camoflauge patterns help conceal by breaking up the shape of the lens
Neoprene acts as a thermal barrier protecting hands from hot and cold
Slides on like a sleeve
Made in the USA