Vortex Weighted Jump Rope - Heavy Speed Rope for Crossfit Workout - Best Exercise for Kids or Adults - Adjustable, so Good for Children or Adult Fitness - Burn More Calories - Perfect Rx for Heart - Lose Weight Fast AND Build Strength - Quality Guaranteed NEW AND IMPROVED DESIGN - No key or adjustment wrench to lose, unlike most of the other adjustable ropes! Just cut, fold and insert and you're done. The Vortex 3 in 1 Jump Rope is made of the finest quality materials, and has easily adjustable, weighted foam handles for better grip - won't slip even in the toughest workout. This Jump Rope Is the perfect addition to your Crossfit workout - burn calories AND build strength - 2x the workout = 2x the benefit Weighted jump ropes are a proven effective cardio and fitness aid - jumping rope burns more calories per hour than almost any other form of exercise, and that's even without the weighted handles! This jump rope is made of sturdy materials and features precision design, which allows us to offer a 60 Day Iron Clad Refund Policy, along with a 1-year limited manufacturers warranty against defects and workmanship