3 DIFFERENT LEVELS: 3 different color bands in total for fitness resistance bands: yellow band (15-25 lbs), red band (50-75 lbs), black band (250-300 lbs); can be used alone or combined for resistance bands to increase strength; According to different levels of fitness resistance bands, achieve different levels of targeted muscle building training. ADDITIONAL DOOR ANCHOR: Fitness resistance bands provide you with an additional door anchor to help you perform workouts at home, in a hotel room or anywhere there is a door. Can help you use fitness resistance bands for effective full-body workouts anytime, anywhere! 100% SKIN-FRIENDLY LATEX: The Fitness Resistance Set The three-piece band is safe and durable because the resistance bands are made of multi-layered, environmentally friendly natural latex. The resistance bands focus on durability, elasticity and flexibility, odorless, safe to use and improve the sense of use for you. MULTIFUNCTIONAL: Fitness resistance bands are ideal for rehabilitation, physiotherapy, fitness, body training and strength training. Elastic bodybuilding bands are ideal for bodybuilding, physiotherapy, rehabilitation, Pilates and stretching. Add them to any strength routine to challenge your muscles.