- Foot Tension Device High-quality environmentally friendly rubber Tensile force is not easy to break Increase comfortable foam handle Sweat-absorbing foam material Delicate without hurting hands and not slippery Plastic inner tube Strong and not easy to break Double layer design flexible without stuttering Thickened NBR soft without stuttering Thickened and highly elastic TPE tube Super tensile force is not easy to break Easy to pull out a good figure
