Longer and wider resistance bands:Length: 14.5", width: 3.15", Perimeter: 29",Comes with a free Instruction Guide and Carry Bag.Small and portable, you can use the fitness bands at home, at the gym, outdoors, etc. High end exercise bands:Resistance bands is sewn with high quality cotton polyester stretch fabric,it is firm and soft, will not break and comfortable.Resistance bands set built-in elastic natural latex liner increases the elasticity and durability of the tension bands. Non-slipComfortable durable, and elasticity are better than traditional resistance band made of latex or rubber. Resistance Level:There are 3 levels of resistance namely light (14-25lbs), medium (29- 35lbs), and heavy (39-55lbs), As you advance from beginner to pro, switch the resistance from light to medium to strong, helping you step up your workout game and train like a pro. Booty Bands Suitable for almost everyone:Elastic bands for exercise such as Squats, Lunges, Crunches, Straight Leg