Crossover Symmetry Crossover Cords Crossover Cords feature a unique handle and carabiner configuration allowing for easy setup on a chain link fence or using our CS Door Belts/Wall Mounts. In addition, the Crossover Cords feature a full length nylon sleeve which protects the high grade latex tubing from UV rays, overstretching and premature cord breakage resulting in an outdoor resistance cord that will last up to 5 times longer than unsleeved latex tubing. Sold in pairs to facilitate crossover symmetry exercises. Does not include workout instruction. Crossover Cords sold in pairs, available in 5 resistances: Green: Super Light (3.5lbs.) Purple: Light (7lbs.) Yellow: Medium (10lbs.) Red: Heavy (15lbs.) Blue: Super Heavy (25lbs.)