Polyester Blend Made in the USA or Imported DURABLE CAST IRON: Constructed from durable materials that increase toughness and stability as you train; Strong build will not break after vigorous workouts EXCELLENT FOR TRAINING: These workout dumbbells are excellent for resistance training; The easy-grip handles give you control for bicep curls and other arm exercises NON-SLIP NEOPRENE COATING: Ideal training for toning and sculpting arms, shoulders, back while you build stamina and improve metabolic rate; The malleable handle on this weight dumbbell makes it easy to grip COMPACT AND ERGONOMIC: Designed for complete control during your workout and small and compact enough for fitness training on the go; Perfect for home workouts or walking exercise