Crossfit Exercise Fitness Resistance Loop Bands, High End Exercise Bands. Our 12″ By 2″ Heavy Duty Resistance Loop Bands Are Made Of 100% Natural Latex. 5 Varying Resistance Levels. Great With Any Workout. This Resistance Band Set Can Be Integrated Seamlessly With Every Popular Workout Program Including Yoga, Pilates, While These Resistance Bands Are Often Used For Sports And Fitness.