Thera-band tubing includes natural rubber tubing proper use of these systems for resistive exercise provides both positive and negative force on the muscles, improving strength, range of motion and cooperataion of muscle groups *Color-coded progressive resistance gives at-a-glance documentation of progress from one level to the next.

Tan - Extra thin
Yellow - Thin
Red - Medium
Green - Heavy
Blue - Extra Heavy
Black - Special Heavy
Silver - Super Heavy