MIL-SPEC ROPES MS1 Jump Rope - Crossfit Speed Jump Rope Best Jump Rope for Double Unders & WOD Double-unders are a snap with the slim, full-tactile feel handles. You'll "feel" the rope coming around and increase consistency in your workouts. High quality bearing assembly for non-slipping handles. Slim, fast cable perfect for double unders and improving WOD times. CNC-machined aluminum handles provide the perfect grip for double unders. Killing your WOD starts with the MS1.