The Nomad Sport Band is made from durable LSR silicone, a biocompatible, antimicrobial, and hypoallergenic material, ensuring soft, safe, and comfortable wear. It features water resistance and hypoallergenic properties, and it's compatible with various Apple Watch sizes including 49mm, 45mm, 44mm, and 42mm. Designed to fit wrists from 150mm to 210mm, the strap meets the ASTM B117 salinity test, ROHS standards. Ideal for those seeking a reliable and stylish band for their Apple smartwatches.