There are many opinions on what the hardest Rainbow Loom bracelet is. Some people say that the Triple Single is the hardest, while others believe that the Fishtail is more challenging. Ultimately, it depends on your level of experience and skill.
If you are a beginner, then the Triple Single may be the hardest bracelet for you to make. It requires three separate colors of rubber bands, and you have to loop them around each other in a specific pattern. If you make one mistake, it can be difficult to fix and your bracelet may not look as nice.
The Fishtail is also considered to be a difficult bracelet for beginners. You need two colors of rubber bands and have to loop them around each other in a specific way in order to create the fishtail effect. This can be tricky and takes some practice before you get it right.
If you are an experienced Rainbow Loom user, then there are some more advanced bracelets that may be more challenging for you such as the Hexafish or Ladder Bracelet. These require additional steps and techniques that may not be familiar to those who are just starting out.
Ultimately, there is no definitive answer when it comes to what the hardest Rainbow Loom bracelet is because it varies depending on your individual skill level and experience