Resistance Bands Set: This set contains 3 pieces of 60cm elastic bands, which help to achieve a full body stretch more effectively and improve the exercise of legs, buttocks, waist, arms and back back, etc. Grade 3 elastic band: 0.35 mm thickness (5 ~ 10 lb tension value), 0.5 mm thickness (10 ~ 15 lb tension value), 0 thickness, 7mm (tension value 15~20 lbs). Easily adapts to your workout based on your strength and muscle flexibility. They work great when you're laying down and looping. Premium Quality: Made of tough rubber with a focus on durability, the workout bands are abrasion and tear resistant while maintaining the tension needed to complete your workout. Strength/Flexibility Training: These resistance bands allow you to exercise muscle tone in different directions, ideal for yoga, pilates, strength and flexibility. Lightweight and portable: It slips into any bag and is always at hand. It is convenient to take it with you when you are on vacation, on a business trip or in the park, and you can effectively exercise your whole body anytime and anywhere.