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 also includes a door strap that lets you safely secure the tube to a door for additional target activities.
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