PERFECT FOR BUILDING MUSCLE: They are perfect for Muscle Building, Fat Burning, Weight Loss, Cross Fitness Training, Pilates, Yoga and Improving Fitness Levels RESISTANCE: 15 to 30 LBS (Only for Beginners) They are lightweight, easy to carry and great for home, gym and travel QUALITY MATERIAL: The exercise resistance ropes are made from 100% free of Latex,highest quality rubber and TPR Foam for maximum strength and resistance. TRAIN WITH COMFORT: They have soft foam D-handles, pre-attached, for continued comfort during repetitive movements. Cushioned foam handles provide comfortable and slip-free grip.