Exervo Water Aerobics and Exercise Foam Pool Dumbbell Weights Combo Set - Medium and Heavy Resistance Pairs - Free Mesh Dry Bag Plus 14 Page Instructional Booklet Included Premium, cross-linked AquaComfort EVA high density foam Water resistant, UV resistant and bacteria resistant EVA foam Set includes a pair each of Medium & Heavy dumbbells to vary resistance levels These dumbbells offer moderate to difficult resistance. Also available in Light, Maximum & SuperMax resistance levels Free 14 page instructional starter guide plus mesh storage dry bag