This set consists of 1 watch with a NATO nylon strap plus 2 extra NATO nylon straps. Case diameter is 40 mm. Sporty and elegant Stainless Steel watch with 10 bar water resistance and date indication. OXYGEN PARIS Inspired by the sports fashion trend, Oxygen's new signature Exchange collection was launched in July 2011 in France and is now available in more than 20 countries. The trendy watch brand with interchangeable NATO straps is following the emerging trend of personalisation and interchangeability. The "Sport" and "Diver" models come with interchangeable straps, like those used by NATO soldiers. These straps can be easily switched in a matter of seconds, no tools required. The nylon straps are very strong, dry instantly and allow you to match your watch to your outfits and your activities.