I suggest going with the Blackjacket. Check out the website which is pretty informative. I have tried the horseblanket type which is OK but you need a clamp or velcro on the camera or something else to really keep it dark. I tried the BTZS which is OK but the elastic is too tight on some cameras and the thing is a sauna in the summer and a humidifier in the winter. I bought a Blackjacket and was impressed by the overbuilt quality. I have not been able to use it a lot yet, but I like it best so far.