Sands Pro Core Barefoot MainlineSands Pro Core Barefoot Mainline The Sands Pro Core Barefoot Mainline is a coated spectra barefoot mainline measuring 85ft total length with 10ft and 5ft shortening sections. Coated spectra construction holds shape under repeated barefoot loads and resists abrasion against handle leaders. The 85ft total length gives standard barefoot tow distance, with 10ft and 5ft drops to bring the skier closer when working on shortened line skills. Spectra core