Helps to develop torso stability, targets and tones specific muscles * Stimulates the resistance and flexibility of exercises performed * Stretch Bands add upper and lower body resistance to mat work and helps stretch, strengthen and streamline muscles * Lightweight and portable * Includes: Evertone Tone & Stretch Resistance Circle (14" diameter), Regular Strength (green) Evertone Stretch Band, Extra Strength (blue) Evertone Stretch Band, Tone & Stretch instructional DVD