CASIO GBX-100SFJ-1JR Bluetooth G-SHOCK G-LIDE Surfrider Foundation Collaboration Black Water Resistant Shock ResistantProduct Highlights This is a collaboration model between G SHOCK, which supports top surfers and extreme sports, and the "Surfrider Foundation Japan," which continues environmental protection activities with surfers who love the ocean. This model features a solid black body design that you will want to wear every day as your companion while surfing. The base model G LIDE "GBX 100" is equipped with features that surfers will appreciate, such as a tide