Premium Horween leather, perfect to wear for work, casual outing or to a special occasion The Fitbit Ionic perforated leather band is not intended for high intensity workouts. If the band gets wet or dirty we recommend using a non-abrasive, lint-free cloth. If needed, you can lightly dampen the cloth with water and let the band air dry. Due to the natural characteristics of genuine leather, each piece will have a distinct variation in color and texture. To maintain the life of your leather band, limit direct exposure to sunlight and moisture, which may cause fading over time. For light-colored leather accessory bands, minimize direct contact with dark-colored clothing, as color transfer may occur. The Fitbit Ionic perforated leather band is not sweat or water-resistant. We recommend limited to no contact with moisture to reduce discoloration/damage to the band. The Fitbit Ionic perforated leather band is made of Horween leather and includes an aluminium buckle. Horween leather is a high-quality leather hand-crafted and tanned in Chicago through traditional tanning techniques. Because this band is made from natural materials, it will mold to your wrist and develop an aged patina finish over time.