Neoprene dumbbell sets give those who want to work out at home an inexpensive starter option. Neoprene dumbbells often are available in multiple colors, making it easy to organize the weights. Some of these dumbbells may be gray or black to resemble iron dumbbells. Neoprene dumbbell sets consist of a cast iron interior like traditional dumbbells. However, the exterior has a neoprene coating layer. This layer has a bit of softness to it, and it also gives the user a good gripping surface. Most neoprene dumbbells are small in weight, usually ranging from 1 to 20 lbs. apiece. Sets of these dumbbells usually involve a few different weight ranges. A set may consist of 6 to 12 dumbbells in total.