The first of its kind, the Nike Grind Dumbbell is crafted from Nike Grind rubber, a byproduct of Nike's footwear manufacturing process. Measured by total product volume, each dumbbell contains at least 20% Nike Grind rubber. With bold Swoosh branding, anti-roll geometry, sculpted edges, and a knurled handle, it delivers durability, comfort, and control for every workout.Now, it's time to get your hands on this unique dumbbell that makes you want to workout! JUST DO IT.Note: Because footwear color palettes vary from season to season, each batch of Nike Grind rubber is unique and yields a limited edition run of these dumbbells as they're released. While these dumbbells will always have a consistent base color, the Nike Grind particle mixture will vary from product to product.