High quality 'soft touch' silicon rubber watchstrap. Totally matt fish. Extremely flexible and very strong - you're likely to tire of wearing this strap long before you wear it out ! High quality stainless steel deployment (deployant) buckle/clasp. 100% waterproof and highly resistant to many corrosive substances that would normally destroy a leather watchstrap, ie. oil, detergents etc. Great for Seiko, Citizen and other Professional Divers and sports style watches requiring a 20mm strap or bracelet.