• Easy to use：Folding design. What you need to do is just setting the interchangeable resistance bands on the comfortable padded arm rests.Then fix the comfortable padded arm rests to the inside of the arm.Finally pull the ergonomic hand grips.
• Reduce expenses：With the wonder arms you will no longer need to spend heavily to the gym.Get amazing results at home.Firm&Fabulous arms in minutes a day.
• Less strain on joints：Force evenly.Minimize damage to joints.You'll instantly feel your muscles toning and tightening as you burn calories without joint strain.
• Great for all fitness levels：3 interchangeable resistance bands with three colors,Different colors represent different power levels.The green is beginner,the yellow is intermediate,the red is advanced.They can be used by single or in combination.
• Total arm workout system：Apply To Exercise Triceps,Biceps,Chest,Shoulders,Back etc.In fact wonder arms unique dynamic resistance movement works your arms,shoulders and back all at the same time.