Features: Made of environmental-friendly polyester cotton and latex, durable and stretch further. 3 exercise resistance band strengths-light(24lbs), medium(32lbs), heavy(49lbs). Comfortable fabric provides high elasticity, non-slip design prevents any rolling or slipping. Combine the resistance bands freely to give different resistance levels for your workouts. Suitable for yoga, Pilates, working out, stretching and physical exercise.