Comfortable alternative to hand weights or dumbbells Tones and strengthens by adding weight resistance to your routines Place on body for additional resistance Perfect for Pilates, yoga, fitness training, and physical therapy Choose 2-pound (Moss), 4-pound (Red Rock), or 6-pound (Ocean) sizes, sold as pair Filled with natural sand and iron Made of non-toxic, phthalate-free material Includes exercise instruction chart with full body workout Dimensions: 4L x 4W x 4H inches Manufacturer's warranty included - see Product Guarantee for complete details About Pivotal 5 Pivotal 5 is an innovative leader in handheld fitness products. Formed in Chicago in 2002, the company uses its unique relationship with industry and research partners to deliver the best in cutting edge product development. Pivotal 5 targets a variety of fitness needs for the home and gym, all while using materials and manufacturing techniques that are safe for our environment. Comfy alternative to hand weights or dumbbells. Available in 2-, 4-, or 6-pound sizes. Non-toxic, phthalate-free material. Dimensions: 4L x 4W x 4H inches. Manufacturer's warranty included (see product guarantee).