This resistance band set is made from 100% Natural Latex and is suitable for various strength training exercises, physical therapy, rehabilitation, pilates, and stretching. The bands come in various resistance levels, ranging from 2-7 kg to 55-150 kg, providing a range of options for users of different fitness levels and training goals. The bands are 208cm long, 4.5mm wide, and come in thicknesses of 6.4mm to 104mm. The set includes a variety of thicknesses for different resistance levels. The assisted pull-up band is especially useful for improving strength, it can be added to any strength routine to challenge your muscles, or used to assist in stretching for increased flexibility and range of motion.