Strechcordz Modular Set ~ Red 12-31lbs ~ Swimmer&#39;s Wet & Dry Land Kit for swimmer&#39;s pull, tricep extensions, rowing, overhead raises, proper hip rotation, stroke efficiency The Strechcordz Modular Set is an exercise machine in a bag. The Modular set is a complete wet or dry-land swim training tool that can be used for pulls, rows, raises, curls, flies  nearly any resistance exercise you can imagine. Comes with a carry bag which includes one pair each of interchangeable handles, paddles, adjusting leg straps, mounting straps and two 4ft/1.2m tubes. Wet or Dry Land Training Improve swim speed and decrease injury