It is compatible product for smart watch :Samsung Gear S3 Classic Samsung Gear S3 Frontier Samsung Gear S3 Frontier LTE-Material : Premium Soft Silicone Sport Band -Sport Band comes with Lugs on both ends, which locks onto Smart Watch Band Interface precisely and securely.Easy and direct installation and one button removal. -An innovative pin-and-tuck closure ensures a clean fit.Metal parts made with stainless steel. -Soft silicone with smooth finish for a sporty look, comfortable and durable. -Fits 5.51"- 8.26" ( 140mm - 210mm ) wrist, easy to adjust the length to fit your wrist