The Pure2Improve Neoprene Dumbbell Sets are a great tool to add to your\n fitness routine. They are extremely versatile and are suitable for use \nin aerobics, weightlifting, Pilates, gymnastics, or joint fitness \nsessions at the gym. The Dumbbells are the perfect addition to your home\n gym as many muscle groups can be targeted and strengthened, from using \nlight weights and performing multiplanar movements to increase \ncoordination and elasticity of your muscles, to using heavier weights to\n strengthen and increase the force of contraction of your muscles.\n\n \n--The\n Pure2Improve Neoprene Dumbbells are made out of iron and covered in a \nlayer of non-slip neoprene for excellent grip and comfort, meaning they \nare long lasting and will withstand the most intense of workouts. \n--The square design has an advantage which keeps the dumbbells from rolling around when put down, making it safer for the user. \n--The Neoprene coating ensures the dumbbells are less slippery if your .