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 is made with at least 20% Nike Grind rubber. With prominent swoosh branding and numbering, robust rubber, and sculpted edges, this dumbbell offers both durability and comfort for all your training sessions. A medium knurled handle ensures a secure and comfortable grip, delivering the ideal balance of friction and control. The dumbbell is arguably the most versatile piece of gym equipment one can own - enabling thousands of movements to the athlete. Now, it's time to get your hands on this unique dumbbell that makes you want to workout! JUST DO IT. NIKE GRIND: Measured by total product volume, each dumbbell is made with at least 20% Nike Grind, a recycled material made from Nike's footwear manufacturing process ANTI-ROLL: Durable rubber hex construction prevents rolling and reduces damage to floors SCULPTED EDGES: Contoured edges provide comfort while lifting KNURLED HANDLE: Knurling provides the perfect blend of friction & control WARRANTY: Welds: Limited Lifetime Warranty* Warranty is void if dropped from over 24" 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 the grey base, the Nike Grind particle mixture will vary from product to product.