perfect for cold weather pockets
I bought the 5 pack. The smaller 4 are perfect for fly fishing. The 5th is the right size to add some weight to a few of my Joes Flies spinners. I like to fly and spin fish for trout. They are safe for the environment and the right color so the fish can't see them. I'm not sure they are truly reusable though. You need a lead weight for that.