[HIGH QUALITY NATURAL LATEX] SKONYON resistance bands are made of high quality and eco-friendly natural latex material. These exercise bands are extremely durable, which can be stretched repeatedly using. Each fitness band is continuous layered and carefully constructed to provide the maximum resistance. [4 DIFFERENT RESISTANCE LEVELS] SKONYON pull up birdsongs; provide numerous tension options. You can use these stretch bands individually or combine them to receive additional tension levels. Four Resistance Levels: Red, 15-35LB; Black, 25-65LB; Purple, 35-85LB; Green, 50-125LB which help to most efficient training. [EASY FOR ANY EXERCISE] These fitness bands set are perfect for exercising and allow you to perform the widest variety of resistance training. Great for toning your chest, abs, biceps, triceps, shoulders, quads, glutes, buttocks, knees, legs and butt, and physical therapy to help strengthen torn ligaments or muscles [PORTABLE FOR TRAINING ANYTIME ANYWHERE] The strength heavy duty pull up assist bands comes with a storage bag, light weight and takes little space. You can doing exercise in anytime and anywhere at home, to gym, office or even take it on your trip. With it you can do resistance band workouts wherever you go!