-They tangle really easily. Ill keep my fingers crossed that the replacements survive the abuse I plan on putting them through! They acknowledged that this was a challenge while trying to create a product that channels the audio directly into the ear canal. Save your money and do not buy this set, as they do not work as advertised. A one mile run was painful. I wasnt sure that I want to switch from Nikon, but I like the concept of using same lenses for a6000 series and A7 series :-) Great shipping, got here faster than another item that was Prime. Randomly she told me she wanted Catboy slippers. They?re really warm, warmer than I expected, and seem to be of pretty darn good quality. Then he dies.