POWER LOOPSThe GoFit Power Loops are an excellent way to strengthen and tone your lower body. The size of this exercise tool makes it a great "Go Anywhere, Train Anytime" tool. The band resistances are approximately equal to 5 LB (red), 10 LB (blue) and 15 LB (green) which provide multi levels of resistance to grow with your training needs. Loops resting diameters are approximately 9. 25" to 9. 5".