Made from a custom high-performance fluoroelastomer, the Sport Band is durable and strong, yet surprisingly soft. The smooth, dense material drapes elegantly across your wrist and feels comfortable next to your skin. An innovative pin-and-tuck closure ensures a clean fit. The apple watch bands are made of pure silicone and flexible elastomer. Durable and soft silicone material across your wrist, improves airflow and comfort, bring you a comfortable wearing experience. An innovative pin-and-tuck closure ensures a clean fit. Metal parts made with hypoallergenic nickel free stainless steel. Soft silicone with smooth finish for a sporty look. Comfortable and durable Personalized Your Apple Watch with this refined replacement wrist band.