These resistance bands absolutely helps to create effective fitness & weight loss programs. Perfect training for arms, shoulder, hips, legs, back, belly, glutes. You can get full stretchy to work out on different muscles with different strengths. Great for men, women, adults. Enjoy a full body workout at home, office, gym, outdoor or anywhere.Yellow band for 10lbs, green for 20lbs, blue for30lbs,red for 40lbs, black for 50lbs.Colors:Assorted