Made of nonallergenic waterproof natural resin and leather， Waterproof and sweat stink free and tasteless,washable. Make you feel light, sturdy, soft and flexible during your wear. For Hublot Big Bang Series size 19mmx25mm buckle position 22mm WHAT YOU GET: 1 x Watch Band, 2 x TooL, 3 x Spring Exquisite craftsmanship and stylish design are perfect gifts for friends and family. If you have any problems, please feel free to contact with us. We are very happy to help you.