I've been tying a lot of squirmy worm patterns with these. I've found them to be durable on the vise and in the water. I use a 220 denier thread and haven't cut through the material. You can also use glue, just the right one. I've been using Loon UV glue and a foam safe CA and had no problems; they won't dissolve the worm. Caught 6 or 7 bows the other day on the same worm; still going strong. great product; going to try some other colors.