Cotton rope hammock is made of 8 mm thick cotton rope,which is designed for maximum density without sacrificing comfort,density 8mm rope improves comfort by significantly reducing rope elongation under tension. Individual ropes pull against each other to produce a lattice-like design, thus eliminating the need for knots within the rope bed itself. Hardwood spreader bar features countersunk spreader bar holes that reduce the severity of the friction between rope and wood.