this Sako wrist strap is Defective from the start ,why the underside of the strap as cuts by design to permit bending ,But also causes the strap to brake at the cuts ,It will last you 1 year at best. And the strap is over priced .why  becauseyou cant find them in local places you have to dig and the seller is aware of this ,So my advice is have your watch chaged to another strap not this black rubber strap . The only thing nice on the strap is the Buckle but then ,your buying a strap not a buckle.