Fitness Republic Neoprene Dumbbell Pairs, Free Hand Weights (Combos) These dumbbells sets take very little space and can be placed anywhere such as your home, gym or even your office Neoprene Coating which makes them Comfortable to Hold Dumbbells Cast Iron Interior - Builds strength and Improves muscle tones Neoprene dumbbell sets are just what the doctor prescribed comes to aerobics, light lifting at home, heavier lifting, bodybuilding and toning, strengthening muscles, relieving stress and reducing common aches or pains Manufacturers Warranty Included (12 Months)