You can choose the intensity level so you can train a variety of different types regardless of age or gender.You can use either one loop band or use multiple bands together for the right level of load. Stretches easily by wrapping it around your foot, ankle, calf, thigh, wrist, upper arm, etc.Not only that, but it can also be used to strengthen your joints, muscles, rehabilitation, and even strengthen your body.This product can be used by both men and women of all ages. You can exercise intensively anywhere you go at home, office, hotel room, etc. Six Different Resistance Levels Pink XS 3-6LB Red S 10-12LB Blue M 15-20LB Green L 25-30LB Black XL 35-40LB Yellow XXL 45-50LB