SpiraFlex resistance technology was developed for NASA and is proven to be as effective as free-weights. Just snap on 5 lb. rated FlexPacks to adjust the smooth quiet resistance, which minimizes stress on your joints (due to the absence of momentum of weights).  Patented DoubleFlex action activates both sides of muscle groups during each movement, reducing required workout time.

— Workouts Range From 5 To 20 Minutes (see DVD)

— Replaces Dumbbells And Bands

— Used By NASA Astronauts On The Space Station

— Snap On Flexpacks For 5, 10 And 15 Lbs. Of Resistance

— Patented Doubleflex Movement Sculpts Both Sides Of Muscle Groups

— DVD Includes 9 Workouts

— 50 Page Guide Includes Nick Bolton's Workouts And Nutrition Programs

— Includes Leg And Door Attachments