Also stops your fingers freezing to the camera, and helps get a better grip on it too. About the only reason for my not using them is if I want to use a motor winder. I do take the front part off and leave it in the car though, as it's seriously annoying dangling in front of your face and won't fit over anything longer than a 50mm lens anyway.
Originally Posted by Yashinoff
I have noticed a direct correlation between presence of an ERC and the condition of used cameras. My best ME and MX both came in ERCs which had taken all the scuffs and scratches, the cameras were perfect inside.