I also have used them for years, but some of the last I purchased only lasted about a week. The wool yarn was flying out of them with every shot. Finally I got some wool yard, cut it into 2" pieces then got some ribbon and used the wifes sewing machine. The trick is shorting the stitch length so ever strand of yard is sewn onto the ribbon. I made some with several different camo colors mixed. They work great and cheap to make. Probably took me 1/2 hour for each puff.