I don't know if there is a difference between how the black and cream ones are made, but the cream colored ones developed holes after the first use. The black ones are still going strong after many uses. I have a size 8 foot, not particularly narrow or wide, and they did fit perfectly. There was virtually no-show and they stay on really well. I'm just really annoyed that for the price I paid, 50% of the order was useless. My toenails weren't long (in fact one of the several holes appeared on the side of my baby toe) and my job does not require walking around a lot. It makes no sense to me that the cream ones bit the dust right away.

The ones that didn't get holes on the first wear I have been wearing almost every day to work and they are perfect. I have washed them numerous times. What I usually do is put a few drops of detergent on them, squish squish them a few times them under running water to rinse the soap out, and hang them to dry. That's it! Simple, and so far the silicone bits haven't come off.

Maybe it was just a coincidence or something and it had nothing to do with the color, but I am going to order these again in JUST BLACK and see if the same thing happens. I really want to like these, but I can't bring myself to give full stars without knowing if half of the order will be a waste again or not.

I'll be back with an update after I try the next set out

*UPDATE*
Got the pack of four, black only, have worn and washed them all multiple times and they are totally fine. No holes. I will just stay away from those cream colored ones, these things are too pricey to risk the holes and the black ones are more invisible anyway (most of my shoes are black or have some black in them). Giving it one more star. Still deducting one for the crappy cream ones.