XtraCore+ is constructed of a first and second layer of braided polyethylene, with a core that is a third inner layer of polyester filaments with an addition of DSM's super-strong ultra-high molecular weight polyethylene (UHMWPE), which gives it a higher coefficient of friction, helping its durability against adverse climates, highly demanding tides and currents and, above all, attacks by wildlife, such as sea lion bites.