Highlights: WHY FOUR LEVELS INSTEAD OF ONE: COST EFFECTIVE-Regarded as one of the most economical exercise equipment, We offer four different resistance levels in one kit for many people buy more than one pull up band and combine them for more efficient training. As your strength gradually increases, you can switch it to higher level band, or even to use two different bands at one time. The whole kit is much more worthy than single band. Most likely save half price compared to other resistance bands. DURABLE & NATURAL: All bands are 100% made of re Natural Latex Rubber which is environmental and improve comfort and wear-resistant performance without losing its elasticity after being used for a long time. With heavy duty material to avoid breakage or tearing. Different from the others is that they can be stretched repeatedly year after year. SAFE & MULTIFUNCTIONAL: The durable bands ensure safety, Perfect for men and women learning pull ups, chin ups, stretching, power training or any other training. Workout your arms, back, shoulders, legs, and butt all at once with powerlifting bands, perfect for functional training, yoga, and physical therapy to help strengthen torn ligaments or muscles. Heavy duty resistance bands are even used for most muscle rehabilitation, and usually do not require a partner to support you. BONUS CARRY BAG & QUICK TO START: Our resistance pull up bands are so compact that it practically does not even take up any space or weight. You can even hang them on a hook or hanger after your exercise. Come with a user instruction with pictures. It will help you easily start with these bands, even for new beginners. Portable for travelling and carrying. You can start your exercises with them anywhere you like. 100% SATISFACTION GUARANTEE: All products is back with 12months warranty from the date of its original purchase. We stand by the quality of our exercise bands and offer 24 hours customer service via email. If you have any questions, please feel free to contact us. We will offer you 100% satisfaction suggestions or service. Pull-ups are one of the most effective exercises for building upper-body strength and muscle mass. The 4 Levels Pull Up Assist Band gives you the ability to focus on the correct form, And target the muscle groups that you want to work out and allows you to gradually build up your strength. Professional Bands of 4 Resistance fitness bands provide the users with 4 professional levels. It’s perfect for Body Stretching Training Heavy Duty Resistance & Mobility. Suitable for men and women, even for kids, professional and amateur alike to use at home, saving the expensive gym member fee. Specification: Red: 2080 x 13 x 4.5 mm/ 81.9 x 0.5 x 0.2 inch/110 g/ 3.9 oz/15-35 lbs Black: 2080 x 22 x 4.5 mm/ 81.9 x 0.9 x 0.2 inch/190 g / 6.7 oz/25-65 lbs Purple: 2080 x 32 x 4.5 mm/ 81.9 x 1.3 x 0.2 inch 280 g/ 9.9 oz/35-85 lbs Green: 2080 x 44 x 4.5 mm/ 81.9 x 1.7 x 0.2 inch/390 g /138 oz /50-125 lbs Choosing a proper band Choosing bands depends on how strong you are currently in your lats&biceps and what your current body-weight is. The thicker your pull up band, the more weight it takes off you.