THE RESISTANCE 90 IS A PORTABLE RESISTANCE TRAINING SYSTEM. YOU CAN CHOOSE TO USE THE SLASTIX RESISTANCE BAND WITH THE COLLAPSIBLE BAR OR BY ITSELF. THE RESISTANCE 90 ALSO COMES WITH A FOAM DOOR ANCHOR OR SPINE STRAP SO YOU CAN EASILY WORKOUT IN YOUR HOME. THE COLLAPSIBLE BAR MAKES THE RESISTANCE 90 PERFECT ON-THE-GO FITNESS. GET A FULL-BODY WORKOUT WHEN AND WHERE YOU WANT, WITH THE RESISTANCE 90.