IMPRESSIVE QUALITY: Made from 100% natural latex. Comes in 4 different resistance strength levels: X-Light, Light, Medium and Heavy. This makes them perfect whether you are just starting to workout or a seasoned workout warrior. 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, also good for Physical Therapy, Recovery or to increase Mobility. PORTABLE CONVENIENT?The carrying bag makes it easy to bring them everywhere. Have an effective workout anywhere at home, the gym, or on the go while travelling or outside. 4evershape loop Bands go where you go! WHATS IN THE PACKAGE?4 exercise loop bands with color-coded resistance levels Carrying Bag and Exercise Manual. All bands measure 10" by 2".