Amazon.com
SPRI Xertubes provide an easily portable, highly versatile way to add resistance training to your workout. Constructed of durable rubber with secure plastic and webbing handles, the Xertubes are suitable for a variety of toning exercises, body types, and fitness levels. Color-coded blue, this Xertube is recommended by SPRI for the upper body workouts of advanced men and women. It offers heavy resistance for the muscle groups in the back, arms, shoulders, and trunk. SPRI a (more…)
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