X-LIGHT (5–10 lbs) – Gentle resistance for rehab or beginners LIGHT (10–15 lbs) – For toning & light training MEDIUM (15–20 lbs) – Ideal for intermediate users HEAVY (20–30 lbs) – Step up your leg/glute training X-HEAVY (30–40 lbs) – Perfect for strength training Specifications Material: TPE Suit for:Adult Applicable Scene:Fitness,Weightlifting,Yoga and so on PACKAGE: 5 x Loop Resistance Bands 1 x Bag.