Headphone sleeves

I just wanted to warn anyone to be EXTREMELY careful if adding headphone sleeves to your headphone wires - they work all right for me, and at first I was THRILLED with the fact that they didn't get tangled up and that it looked good, but later on I've been having some problems because I was a bit rough-handed while knitting (as in, the sound will go off and I'll have to straighten the cables to fix it). This might have been the fact that I used DPNs for part of it, the i-cord part seems to be looser and less weird.