D12 99 takes Marlow's premium range of pre-stretched 12 strand ropes manufactured and add's Dyneema SK99. roughly 15% stronger than standard D12, D12 99 maintains the light weight and low stretch of D12 but with higher stength for higher load or diameter critical application. D12 99 also comes with Marlow's ArmourCoat coating as standard, increasing abrasion resistance and coefficient of friction and is also available with outher coatings that can improve grip, reduce flex fatigue or manage heat generation.