There are three cable assemblies included; the headphones, the microphone, and the extension cable. I had originally assumed that the microphone was wired in with the headphones, so that you always had to have it dangling around your neck, even if you just wanted to use the headphones. I was very pleased to see that you could use each component separately, but that they could all be joined together nicely for use in collaboration.
The images below show the headphones with the pre-installed set of "triple ribbed" ear sleeves. The ear sleeves are extremely soft and conformed to my ear canal nicely. The ribbed design locks them in place, so even while running and jumping around I could not jostle them loose. The cable is approximately one meter long, and the split between left and right is asymmetrical, with the 1m cable running to the left ear, and another length running from the left to the right ear.
One thing I did notice while running with the Siberia In:Ear Headset connected to a portable MP3 player was that the sound of the wind passing over the headphones creates a whistling noise that seems quite amplified. I have not experienced this with other earbud style headphones, and it was a bit annoying. While stationary the sound quality was great, and most outside noises were quieter, if not silenced. With wind passing over them, the music volume needed to be increased and I wound up listening to things louder than I cared to in order to overcome the whistling.
The images below show the microphone, which also comes connected to a one meter long cable. A small clip is provided to attach the microphone to your shirt, and a small switch allows you to turn the microphone on and off very easily. Two small cylindrical features seen on the cable in the below left image allow you to couple the microphone cable to the headphone cable. This way the to separate cables can be kept organized a bit better, and everything moves pretty much as one.
Next we see the extension cable, which will allow you to be another 1.8 meters from your audio source, for a total of 2.8 meters (about 9 feet). That should be plenty of length for most uses, and allowed me to use the ports on the back of a PC positioned on my office floor with plenty of cable to spare. The female ports on the extension cable are embossed with a depiction of which device gets plugged in where, and the male ends have color coded bands that correspond to the typical green for headphones and pink for microphone. The only issue might be that even if you only want an extension for the headphones, you have the plugs for the microphone dangling there since they are fused into one cable.