Bespolitan Premium Latex Resistance Exercise Band Set (11-Piece), 48-Inch Bands are made of professional quality natural rubber latex Resistance Bands areelastic bandsmade of Latex tubing used for strength training They are light weight, portable and space savingexercise equipment Over 30 differentresistance levelsby attaching 1, 2, 3, 4, or all 5 bands to the handles Perfect for Yoga, ABS, P90X workout