Sunny Health and Fitness Neoprene Dumbbell DURABLE CAST IRON: Constructed from durable materials that increase toughness and stability as you train. Strong build will not break after vigorous workouts. NON-SLIP NEOPRENE COATING: Ideal training for toning and sculpting arms, shoulders, back while you build stamina and improve metabolic rate. 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. MULTIPLE WEIGHTS: The Sunny Health and Fitness dumbbells come in multiple weights and colors. Clear printed weights allow you to distinguish different weights from others. Available in 2Lbs, 5Lbs, 8Lbs, 10Lbs 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