Our 5 Levels Resistance Loop Bands is made from 100% natural latex.The size is 23.6"L X 2"W. Includes five exercise resistance band strengths -0.35mm(5-10lbs), 0.5mm(10-15Ibs), 0.7mm(15-20lbs), 0.9mm(25-30lbs), 1.1mm(35-40lbs).Plus, you can combine them by stacking or knotting together to give many different resistance levels for your workouts. These minibands can be used for your workout, Yoga, Pilates as well as stretching, glute activation, leg day and more. Carry bag included.Customized logo available.