Pack of three resistance loop bands: 3 Level Loops Band Kit to Strengthen & tone legs, hips, gluts & more. Very Ideal for strengthening muscles, Pilates, Yoga, Gym Exercises & Resistance Training. Sizes & Colors: These bands come in four different resistance levels and 4 different colors with clear weight indications: Green(S) - 12.5 x 3.25”; Purple(M) – 14.5 x 3.25”; Pink(L) – 16.5 x 3.25” Great physical therapy tool: For muscular rehabilitation & improving mobility, these bands are super-effective and minimizes pressure on joints when compared to weight-training exercises. You can further adjust the amount of resistance during exercise just by giving more or less slack on the band, as well as by combining multiple resistance bands to increase the challenge. Weight Training & Multi-Functional: Resistance bands are not only perfect for weight training, but if wrapped around the ends of a weight bar, they make exercises more challenging so you can level up your one-rep max.