Micrael Home Heavy Duty Pull Up & Powerlifting Bands Resistance for Stretching, Exercise, Assisted Pull-Ups, Purple Band Highest quality material used - each flat stretch band is made of ultra-durable latex rubber that will not break or weaken over time Sale is for a single band. Choose 1 of 4 different resistance levels Easy to use with a ton of variety to work all muscle groups, even for aerobics, so you can just exercise different muscle groups Many people buy more than one band and combine the bands for most efficient training