Osave Resistance Loop Bands,Set of 4 Exercise Bands for Improving Strength,for Yoga,Fitness Bands for Women (Pack of 4) Suitable for CrossFit, Yoga, Pilates, Fitness Training and ideal for increasing strength and mobility. Use of resistance bands / stretch bands can help to strengthen stabilising muscles which may help to prevent injury or assist greatly in injury rehabilitation. Yellow one:50mm width*0.35mm thickness, Green one:50mm width* 0.5mm thickness ,Purpel one:50mm width*0.7mm thickness,Red one 50mm width*0.9mm width.Different level of resistance making it possible to work muscles throughout the whole body progressively and safely. Use the resistance bands for legs, arms, back or shoulders with any one band individually or multiple bands together to provide the right level of resistance for you. These wide exercise bands are durable and built to last. They can be stretched repeatedly year after year unlike many other fitness bands or physical therapy bands. They are also made from natural latex material which is eco-friendly too. Suitable for office workers,students,housewives,pregnant women,thoes who do not like outdoor exercises,patients who need to Rehabilitation after disease A little simple cute bands may make your workout life much better,you life quality will be improved a lot.Osave promise you 100% satisfaction.