Bungee cords having hooks, loops or clips secured to the ends of the cords; shock cords not of metal; tie down straps made of polyurethane compounds; non-metal strapping or tie downs; non-metal tie down straps in the nature of securing devices including a length-adjustable inelastic section, an elastic section and securing elements attached to the ends of the respective inelastic and elastic sections; non-metal tie down straps in the nature of securing devices including an elastic section wit...