I’m using these to line my down throw pillows to prevent the feathers from poking out through the pillow covers. I’ve been using them for about a month now and they’ve worked great. Not one feather in sight. I ordered queen size which is about double the size of my throw pillows so I was able to double up on the lining. That may be the reason they’re working so well compared to others who have complained that the feathers still come through.