Mammut Serenity 8.7mm Dynamic Climbing Rope Triple certified climbing rope - rated for single, double, or twin usage At a miniscle 51 grams/meter, the Serenity is one of the lightest ropes on the market - ideal for alpinism and high end sport climbing Both the rope sheath and the indvidual strands are given Mamut's proprietary dry COATINGfinish&#8482; giving the rope the best handling and durability available Abrasion-resistant middle marker Rope ends feature durable ultrasound welding which prevents separation and sheath slippage