1. Resistance Bands are elastic bands made of Latex tubing used for strength training. 2. They are light weight, portable and space saving exercise equipment 3. Designed to effectively building muscle strength and tone the body, there are resistance bands for a variety of exercise that specific muscle groups. 4. Its single dipper latex tube, the natural latex is over 99.998% free of soluble proteins (latex allergens) 5. Different resistance level to accommodate for progressive strength training levels: Yellow Band - Extra Light (6 LBS - 8 LBS) Green Band - Light (9 LBS - 11 LBS) Red Band - Medium (12 LBS - 14 LBS) Blue Band - Heavy (15 LBS - 18 LBS) Black Band - Extra Heavy (22 LBS) 6. Strong cushioned foam handles with Zinc alloy clips and D-Ring 7. Easily creating over 30 different resistance levels by attaching 1.2.3.4. Or all 5 bands to the handle. 8.Perfect for Yoga, ABS, P90X workout.