The Evolution Aero used to be a climbing rope best-suited for sport climbers due to its light weight and skinny diameter, but with the advent of Sterling's new DryXP treatment, the Evolution Aero DryXP Climbing Rope also appeals to ice climbers and mountaineers now. DryXP is Sterling's first treatment to meet UIAA's standards for limited water absorption to create a safer standard in icy terrain. This rope packs small for crowded climbing backpacks, and boasts an impressive fall rating for all your flailed redpoint attempts.