Set of 3 Fitbeast non-slip resistance bands with light, medium and heavy levels Fitbeast's set of 3 resistance bands with different levels of resistance is perfect for your home and gym training. It is made of soft polyester and stretchy latex silk. It features an inner layer with three non-slip latex strips that keep the rubber stable and prevent it from sliding or rolling during exercise. Each band has a different resistance, light (6-11 kg), medium (11-16 kg) and heavy (18-23 kg). The rubber bands provide sufficient flexibility, so you have the opportunity to use the rubber bands in many exercises. The set has a travel case, so you can pack it on vacation or throw it in your gym bag. Material: polyester