About this product:As an excellent method of resistance training for the development of specific muscles and tendons, the Health resistance loops pack can be used to add variety to standard workouts. Four different weights offer a gradual challenge and aid to build your muscle strength. Start with the lowest level of resistance and build sets and repetitions gradually. Lightweight and portable, Women's Health resistance bands can be taken anywhere and offer an alternative to heavy and large weights."5 Resistance Bands Include: Made from 100% natural latex. Comes in 5 different resistance strength levels: green (5lbs) , blue (10lbs) , yellow (20lbs) , red (30 lbs) and black (40lbs). They're suitable for beginner or a seasoned workout sportsman. Efficient Workout: Loop Resistance Bands increase the effectiveness of your exercises. Used for a range of workouts, from glute and hip activation, strength techniques to integrate seamlessly with every workout program such as Yoga, Pilates,etc.Multifunctional: The resistance band set can be used to exercise all parts of muscles such as arms, chest, abdomen, glutes and legs, also good for Physical Therapy, Recovery or to increase Mobility.Gym-in-your-pocket: The exercise bands take up little space so that you can use them at home or carry on the way, such as in office, on a vacation, even can squats while watching TV at home.Package:5 Exercise Bands with different strength + manual + bagSize:The different color specifications:Green (5 pounds): 600 * 50 * 0.35MM Blue (10 pounds): 600 * 50 * 0.5MM Yellow (20 pounds): 600 * 50 * 0.7MM Red (30 pounds): 600 * 50 * 0.9MM Black (40 pounds):600 * 50 * 1.1MM