ProSource Stackable Resistance Bands 11-Piece Set with Extra Large Handles, Door Anchor, Ankle Straps, Exercise Guide and Carrying Case TOTAL BODY WORKOUT - Designed to target all of your muscles through a full range of motion for increased strength and toning, without any machines or special equipment. DURABLE CONSTRUCTION - Made with a double-dipping process to ensure heavy duty, high performance latex that holds up to stretching and heavy use. CUSTOMIZABLE - 4 color-coded bands can be used individually, or combined to provide up to 14 levels of resistance and up to 56 pounds: Green (5-8 lb), Red (8-12 lb), Blue (12-16 lb), Black (16-20 lb); 48-inches each. ON-THE-GO CONVENIENCE: Comes in a carrying case with all of the accessories you need to workout wherever you go. Includes 2 extra large foam handles, 2 padded ankle cuff straps, manual door anchor, and exercise guide. VERSATILE: Stackable resistance bands are extremely versatile, great for rehabilitation, toning and strengthening muscles, Pilates exercises, P90X, outdoor workouts, and travel.