Material CharacteristicsTexture: Flexible, smooth, and soft against the skin [Silicone Watch Straps 20mm / 22mm - Jeffry Tech ., TPU Watch Strap Replacement for Casio F-91W/F-84/F-94/F-105 .].Durability: Water-resistant, sweat-proof, and easily washable [Silicone Watch Straps 20mm / 22mm - Jeffry Tech ., Sports Silicone Watch Band].Buckle: The metallic buckle at the top is made of stainless steel [Sports Silicone Watch Band].