Facts-Based Exercise Bands: 5 bands (Pilates training bands) with different tension levels. It ensures that every Resistance Set provides a better tension performance in real usage than in the product description.More Resilient Ankle Straps (Door Anchor): High density nylon bands with stainless D buckles and metal climbing knots guarantee your safety of sports.More Durable Workout Bands: the high-quality of Nylon and natural latex provides impressive durability and resilience with longer-product-aging. No deformation or rupture occurs after 10,000 times of tensile teste.TRAIN DIFFERENT MUSCLE GROUPS :Use these fitness bands to perform rows, pulls, raises, and fly workout sets to exercise your arms, back, hips, legs, chest, and abdominal region.After sales support :If for any reason you are not happy with the quality or performance of these workout bands, let us know anytime and we will be glad to service for you.