octagon & 12-sided trampolines
The octagon & 12 sided trampolines are much safer than the circular design. The springs on an octagon offset the center because of the eight straight rails, so they end up criss-crossing each other to some extent. This results in less pressure behind you and you are less likely to be thrown forward off balance and into one another. There also is more vertical travel in the mat because of eight straight sides. The reason for this is because the springs in the center of the rails stretch more than the springs toward the end of the rails. This produces a softer, better and more controlled bounce then the round design.