Samsung Ridge Sport Band for Galaxy Watch 4 & Galaxy Watch4 Classic. (20mm Band Size) Small/Medium size - Silver Version. 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. Samsung Galaxy Watch Ridge-Sport Band, Small/Medium for Galaxy Watch 4 - Silver