You know different exercise part need different resistance,and even the resistance of same exercise part for different stage people is different too. So you should to know the resistance and the length of bands at first. Blue - Size 13.3 inch - More professional, suitable for serious booty burn and ideal for deadlifts. Pink - 15.3 inch - Perfect progression band as you get stronger and ideal for hip thrusts & kick-backs. Purple - Size 16.5 inch - Perfect for beginner, and ideal for wide stance movements like sumo squats/ lunges. I’d recommend the set of 3 hip resistance bands, which suit for more application scenes and could save more money! BERTER gym resistance bands help exercise different body parts ,use them lying down, seated, or even standing. Shape your body from all angles! These exercise bands are suitable for full-body muscle exercises, they are good for yoga, squats, leg press, hip thrusts, weight lifting etc. These workout bands force athletes to focus on proper form while performing difficult leg lifts. The muscles work harder during different range of motion and produces better results. The Workout Bands make it possible to exercise anywhere and anytime, such as office, school, business trips, vacations, hotel, gym. The workout cloth resistance bands with Non-slip Elastic Design tend to work better at preventing the bands from rolling while you exercise, allowing you to focus on your workout without any impact. It won't snap and pull at your skin and hair. Made of spandex, latex and nylon, durable and flexible. Excellent for all levels from beginner to athlete, the fabric resistance bands are a great choice as: Booty bands Hip bands Butt bands Squat bands Elastic bands Leg resistance bands Exercise Bands is the fitness gift for best choice. Buy hip exercise bands for yourself and one for your friend, workout partner or spouse, this is the beginning of a surprise. 45% Nylon, 30% Latex, 15% SpandexPlease stop using this item if you're allergic to Latex materials.