This yoga strap is made of TPE. This 5 different TPE resistance bands provide a variety of workout routines at home or the gym. Green- 5LB, Blue- 15LB, Yellow- 20LB, Red-30LB, Black-40LB, highly durable heavy duty pull up bands for bodyweight training assistance. Workout your arms, back, shoulders, legs, and butt all at once with resistance loop bands. Orders of 800 sets or greater are eligible for sea shipping. 100% guarantee for quality.