Nixon Base Tide Pro Dark Slate Watch Have Swell, Will Travel.. Make sure the waves you catch are cleaner with the new and improved Base Tide Pro. Now made with #tide recycled ocean plastics, each watch keeps garbage away from the water while keeping you up to date with pre-programmed tide info from 550 beaches from around the globe. It's water-resistant down to the pushers, and the ventilated, silicone band stays in place thanks to our double Locking Loopers. Item cannot be shipped to P.O. Boxes