The Samsung Ridge Sport Band for Galaxy Watch4 & Galaxy Watch4 Classic. (20mm Band Size) Small/Medium size. Gray version. Features: - Designed to completely fit your wrist with a firm and stable grip. The band is durable and sweat resistance thanks to its fluoroelastomer material. - Maintains a comfortable and fitted grip to always provide top-tier performance in daily fitness tracking and health monitoring. The band is designed to make sure your Watch4 accurately measures your health ratings during light or intense workouts |