The NRS Drylander Shock Cord is patterned to stretch easily and fit drum-tight on today's kayak designs. Rubberized inner deck coating grips the kayak combing from the inside, resisting slippage. Tough 4-mm neoprene surface holds well under pressure. Infinity Coating on the front edge and sides gives great Safe guardion in high wear areas.4-way stretch PowerSpan neoprene tunnel gives a snug nice fit.