Edelrid made the amazing Rap Line a little more dynamic, just in case. Made from a blend of high-strength polyamide and aramid, this rappel line has unique dynamic properties and has been tested to withstand 2 falls at the twin rope standard. What this means to you, is that in an inadvertent slip or emergency scenario, your floss-thin line will be able to withstand a slight shock-loading. A good characteristic to have in a world of unknowns. The Edelrid Rap Line II is the new go-to skimo cord for skiing chutes that might not go.