Suitable for all fitness levels, with each band having a different resistance level. Ideal for yoga, Pilates, stretching exercises, fitness programs and can also be used for physical therapy and rehabilitation. 100% natural latex. Set of five. X Light: 0.4mm, Light: 0.6mm, Medium: 0.8mm, Strong: 1.0mm, X Strong: 1.2mm. Size when fl at: 25 x 5cm.